diff --git a/HEADER.txt b/HEADER.txt
index 617b81a..73d6eba 100644
--- a/HEADER.txt
+++ b/HEADER.txt
@@ -1,16 +1,14 @@
-/*
- * Copyright (C) $YEAR AuthMeVelocity Contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
+Copyright (C) $YEAR AuthMeVelocity Contributors
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
diff --git a/api/paper/build.gradle.kts b/api/paper/build.gradle.kts
index d09b3b8..92df27a 100644
--- a/api/paper/build.gradle.kts
+++ b/api/paper/build.gradle.kts
@@ -2,6 +2,7 @@ plugins {
     `java-library`
     alias(libs.plugins.indra)
     id("authmevelocity.publishing")
+    id("authmevelocity.spotless")
 }
 
 java {
diff --git a/api/paper/src/main/java/me/adrianed/authmevelocity/api/paper/event/LoginByProxyEvent.java b/api/paper/src/main/java/me/adrianed/authmevelocity/api/paper/event/LoginByProxyEvent.java
index 173055b..6649c3b 100644
--- a/api/paper/src/main/java/me/adrianed/authmevelocity/api/paper/event/LoginByProxyEvent.java
+++ b/api/paper/src/main/java/me/adrianed/authmevelocity/api/paper/event/LoginByProxyEvent.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.api.paper.event;
 
 import org.bukkit.entity.Player;
diff --git a/api/paper/src/main/java/me/adrianed/authmevelocity/api/paper/event/PreSendLoginEvent.java b/api/paper/src/main/java/me/adrianed/authmevelocity/api/paper/event/PreSendLoginEvent.java
index 366b059..bff3ca7 100644
--- a/api/paper/src/main/java/me/adrianed/authmevelocity/api/paper/event/PreSendLoginEvent.java
+++ b/api/paper/src/main/java/me/adrianed/authmevelocity/api/paper/event/PreSendLoginEvent.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.api.paper.event;
 
 import org.bukkit.entity.Player;
diff --git a/api/velocity/build.gradle.kts b/api/velocity/build.gradle.kts
index c09a044..bdcc68e 100644
--- a/api/velocity/build.gradle.kts
+++ b/api/velocity/build.gradle.kts
@@ -2,6 +2,7 @@ plugins {
     `java-library`
     alias(libs.plugins.indra)
     id("authmevelocity.publishing")
+    id("authmevelocity.spotless")
 }
 
 dependencies {
diff --git a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/AuthMeVelocityAPI.java b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/AuthMeVelocityAPI.java
index f049a4c..bd08fd9 100644
--- a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/AuthMeVelocityAPI.java
+++ b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/AuthMeVelocityAPI.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.api.velocity;
 
 import java.util.function.Predicate;
diff --git a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/PreSendOnLoginEvent.java b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/PreSendOnLoginEvent.java
index d7f64a2..d18ff85 100644
--- a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/PreSendOnLoginEvent.java
+++ b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/PreSendOnLoginEvent.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.api.velocity.event;
 
 import java.util.Objects;
diff --git a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyForcedUnregisterEvent.java b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyForcedUnregisterEvent.java
index 2294e9f..fd38737 100644
--- a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyForcedUnregisterEvent.java
+++ b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyForcedUnregisterEvent.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.api.velocity.event;
 
 import com.velocitypowered.api.proxy.Player;
diff --git a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyLoginEvent.java b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyLoginEvent.java
index c107eae..ab23395 100644
--- a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyLoginEvent.java
+++ b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyLoginEvent.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.api.velocity.event;
 
 import com.velocitypowered.api.proxy.Player;
diff --git a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyLogoutEvent.java b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyLogoutEvent.java
index 0c7a97e..eb15bd1 100644
--- a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyLogoutEvent.java
+++ b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyLogoutEvent.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.api.velocity.event;
 
 import com.velocitypowered.api.proxy.Player;
diff --git a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyRegisterEvent.java b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyRegisterEvent.java
index ae5d007..6210ab8 100644
--- a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyRegisterEvent.java
+++ b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyRegisterEvent.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.api.velocity.event;
 
 import com.velocitypowered.api.proxy.Player;
diff --git a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyUnregisterEvent.java b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyUnregisterEvent.java
index 164ee8a..b0d4469 100644
--- a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyUnregisterEvent.java
+++ b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ProxyUnregisterEvent.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.api.velocity.event;
 
 import com.velocitypowered.api.proxy.Player;
diff --git a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ServerResult.java b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ServerResult.java
index b9abf50..7f54d1f 100644
--- a/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ServerResult.java
+++ b/api/velocity/src/main/java/me/adrianed/authmevelocity/api/velocity/event/ServerResult.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.api.velocity.event;
 
 import com.velocitypowered.api.event.ResultedEvent.Result;
diff --git a/build-logic/build.gradle.kts b/build-logic/build.gradle.kts
index 18057e2..70accc8 100644
--- a/build-logic/build.gradle.kts
+++ b/build-logic/build.gradle.kts
@@ -4,7 +4,8 @@ plugins {
 
 dependencies {
     implementation(libs.plugin.shadow)
-    implementation(libs.build.indra)
+    implementation(libs.build.indra.common)
+    implementation(libs.build.indra.spotless)
 }
 
 repositories {
diff --git a/build-logic/src/main/kotlin/authmevelocity.spotless.gradle.kts b/build-logic/src/main/kotlin/authmevelocity.spotless.gradle.kts
new file mode 100644
index 0000000..cad0883
--- /dev/null
+++ b/build-logic/src/main/kotlin/authmevelocity.spotless.gradle.kts
@@ -0,0 +1,11 @@
+import java.time.LocalDate
+
+plugins {
+    id("net.kyori.indra.licenser.spotless")
+}
+
+indraSpotlessLicenser {
+    licenseHeaderFile(rootProject.file("HEADER.txt"))
+    property("YEAR", LocalDate.now().year.toString())
+    newLine(true)
+}
diff --git a/common/build.gradle.kts b/common/build.gradle.kts
index 5ac12b8..ec62d73 100644
--- a/common/build.gradle.kts
+++ b/common/build.gradle.kts
@@ -2,6 +2,7 @@ plugins {
     alias(libs.plugins.blossom)
     // Required to relocate packages
     alias(libs.plugins.shadow)
+    id("authmevelocity.spotless")
 }
 
 repositories {
diff --git a/common/src/main/java/me/adrianed/authmevelocity/common/Constants.java b/common/src/main/java/me/adrianed/authmevelocity/common/Constants.java
index 799f0e2..c95f41b 100644
--- a/common/src/main/java/me/adrianed/authmevelocity/common/Constants.java
+++ b/common/src/main/java/me/adrianed/authmevelocity/common/Constants.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.common;
 
 public final class Constants {
diff --git a/common/src/main/java/me/adrianed/authmevelocity/common/LibsManager.java b/common/src/main/java/me/adrianed/authmevelocity/common/LibsManager.java
index c099866..a1db5dc 100644
--- a/common/src/main/java/me/adrianed/authmevelocity/common/LibsManager.java
+++ b/common/src/main/java/me/adrianed/authmevelocity/common/LibsManager.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.common;
 
 import net.byteflux.libby.Library;
diff --git a/common/src/main/java/me/adrianed/authmevelocity/common/MessageType.java b/common/src/main/java/me/adrianed/authmevelocity/common/MessageType.java
index 5d830d0..a964a09 100644
--- a/common/src/main/java/me/adrianed/authmevelocity/common/MessageType.java
+++ b/common/src/main/java/me/adrianed/authmevelocity/common/MessageType.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.common;
 
 public enum MessageType {
diff --git a/common/src/main/java/me/adrianed/authmevelocity/common/configuration/ConfigurationContainer.java b/common/src/main/java/me/adrianed/authmevelocity/common/configuration/ConfigurationContainer.java
index cfa12ce..c9f0615 100644
--- a/common/src/main/java/me/adrianed/authmevelocity/common/configuration/ConfigurationContainer.java
+++ b/common/src/main/java/me/adrianed/authmevelocity/common/configuration/ConfigurationContainer.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.common.configuration;
 
 import java.util.concurrent.CompletableFuture;
diff --git a/common/src/main/java/me/adrianed/authmevelocity/common/configuration/Loader.java b/common/src/main/java/me/adrianed/authmevelocity/common/configuration/Loader.java
index 094c43e..0621e9d 100644
--- a/common/src/main/java/me/adrianed/authmevelocity/common/configuration/Loader.java
+++ b/common/src/main/java/me/adrianed/authmevelocity/common/configuration/Loader.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.common.configuration;
 
 import java.io.IOException;
diff --git a/common/src/main/java/me/adrianed/authmevelocity/common/configuration/PaperConfiguration.java b/common/src/main/java/me/adrianed/authmevelocity/common/configuration/PaperConfiguration.java
index ca1f937..0ef61e1 100644
--- a/common/src/main/java/me/adrianed/authmevelocity/common/configuration/PaperConfiguration.java
+++ b/common/src/main/java/me/adrianed/authmevelocity/common/configuration/PaperConfiguration.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.common.configuration;
 
 import org.spongepowered.configurate.objectmapping.ConfigSerializable;
diff --git a/common/src/main/java/me/adrianed/authmevelocity/common/configuration/ProxyConfiguration.java b/common/src/main/java/me/adrianed/authmevelocity/common/configuration/ProxyConfiguration.java
index 09ae2be..9539a5c 100644
--- a/common/src/main/java/me/adrianed/authmevelocity/common/configuration/ProxyConfiguration.java
+++ b/common/src/main/java/me/adrianed/authmevelocity/common/configuration/ProxyConfiguration.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.common.configuration;
 
 import org.spongepowered.configurate.objectmapping.ConfigSerializable;
diff --git a/common/src/main/java/me/adrianed/authmevelocity/common/enums/SendMode.java b/common/src/main/java/me/adrianed/authmevelocity/common/enums/SendMode.java
index 541510c..599af40 100644
--- a/common/src/main/java/me/adrianed/authmevelocity/common/enums/SendMode.java
+++ b/common/src/main/java/me/adrianed/authmevelocity/common/enums/SendMode.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.common.enums;
 
 public enum SendMode {
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 46a2afa..fda9aaa 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -36,7 +36,8 @@ bstats-velocity = { group = "org.bstats", name = "bstats-velocity", version.ref
 
 configurate-hocon = { group = "org.spongepowered", name = "configurate-hocon", version.ref = "configurate" }
 
-build-indra = { module = "net.kyori:indra-common", version.ref = "indra" }
+build-indra-common = { module = "net.kyori:indra-common", version.ref = "indra" }
+build-indra-spotless = { module = "net.kyori:indra-licenser-spotless", version.ref = "indra" }
 plugin-shadow = { group = "gradle.plugin.com.github.johnrengelman", name = "shadow", version.ref = "shadow" }
 
 [plugins]
diff --git a/paper/build.gradle.kts b/paper/build.gradle.kts
index 0639eb3..2cdc224 100644
--- a/paper/build.gradle.kts
+++ b/paper/build.gradle.kts
@@ -1,6 +1,7 @@
 plugins {
     alias(libs.plugins.pluginyml.bukkit)
     alias(libs.plugins.shadow)
+    id("authmevelocity.spotless")
 }
 
 repositories {
diff --git a/paper/src/main/java/me/adrianed/authmevelocity/paper/AuthMeVelocityPlugin.java b/paper/src/main/java/me/adrianed/authmevelocity/paper/AuthMeVelocityPlugin.java
index 60e52e8..b19ae53 100644
--- a/paper/src/main/java/me/adrianed/authmevelocity/paper/AuthMeVelocityPlugin.java
+++ b/paper/src/main/java/me/adrianed/authmevelocity/paper/AuthMeVelocityPlugin.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.paper;
 
 import me.adrianed.authmevelocity.paper.listeners.AuthMeListener;
diff --git a/paper/src/main/java/me/adrianed/authmevelocity/paper/AuthmePlaceholders.java b/paper/src/main/java/me/adrianed/authmevelocity/paper/AuthmePlaceholders.java
index 48f4d1f..283458a 100644
--- a/paper/src/main/java/me/adrianed/authmevelocity/paper/AuthmePlaceholders.java
+++ b/paper/src/main/java/me/adrianed/authmevelocity/paper/AuthmePlaceholders.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.paper;
 
 import org.bukkit.Bukkit;
diff --git a/paper/src/main/java/me/adrianed/authmevelocity/paper/listeners/AuthMeListener.java b/paper/src/main/java/me/adrianed/authmevelocity/paper/listeners/AuthMeListener.java
index 3250668..f659d0c 100644
--- a/paper/src/main/java/me/adrianed/authmevelocity/paper/listeners/AuthMeListener.java
+++ b/paper/src/main/java/me/adrianed/authmevelocity/paper/listeners/AuthMeListener.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.paper.listeners;
 
 import me.adrianed.authmevelocity.paper.AuthMeVelocityPlugin;
diff --git a/paper/src/main/java/me/adrianed/authmevelocity/paper/listeners/MessageListener.java b/paper/src/main/java/me/adrianed/authmevelocity/paper/listeners/MessageListener.java
index 4e9b485..91609e4 100644
--- a/paper/src/main/java/me/adrianed/authmevelocity/paper/listeners/MessageListener.java
+++ b/paper/src/main/java/me/adrianed/authmevelocity/paper/listeners/MessageListener.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.paper.listeners;
 
 import com.google.common.io.ByteArrayDataInput;
diff --git a/velocity/build.gradle.kts b/velocity/build.gradle.kts
index d5e16ca..92500a8 100644
--- a/velocity/build.gradle.kts
+++ b/velocity/build.gradle.kts
@@ -1,5 +1,6 @@
 plugins {
     alias(libs.plugins.shadow)
+    id("authmevelocity.spotless")
 }
 
 repositories {
diff --git a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/AuthMePlaceholders.java b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/AuthMePlaceholders.java
index 02e66de..6942061 100644
--- a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/AuthMePlaceholders.java
+++ b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/AuthMePlaceholders.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.velocity;
 
 import com.velocitypowered.api.proxy.Player;
diff --git a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/AuthMeVelocityPlugin.java b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/AuthMeVelocityPlugin.java
index c9cfd11..0abd62d 100644
--- a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/AuthMeVelocityPlugin.java
+++ b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/AuthMeVelocityPlugin.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.velocity;
 
 import me.adrianed.authmevelocity.velocity.commands.AuthmeCommand;
diff --git a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/commands/AuthmeCommand.java b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/commands/AuthmeCommand.java
index 80074eb..4bed90b 100644
--- a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/commands/AuthmeCommand.java
+++ b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/commands/AuthmeCommand.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.velocity.commands;
 
 import com.mojang.brigadier.Command;
diff --git a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/ConnectListener.java b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/ConnectListener.java
index 9567813..be45715 100644
--- a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/ConnectListener.java
+++ b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/ConnectListener.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.velocity.listener;
 
 import java.util.Optional;
diff --git a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/FastLoginListener.java b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/FastLoginListener.java
index 46b2fd9..cf8cb8d 100644
--- a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/FastLoginListener.java
+++ b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/FastLoginListener.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.velocity.listener;
 
 import com.github.games647.fastlogin.velocity.event.VelocityFastLoginAutoLoginEvent;
diff --git a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/PluginMessageListener.java b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/PluginMessageListener.java
index cf2f024..d23af06 100644
--- a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/PluginMessageListener.java
+++ b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/PluginMessageListener.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.velocity.listener;
 
 import java.util.Locale;
diff --git a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/ProxyListener.java b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/ProxyListener.java
index c04c1b4..2b8aebf 100644
--- a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/ProxyListener.java
+++ b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/listener/ProxyListener.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.velocity.listener;
 
 import me.adrianed.authmevelocity.velocity.utils.AuthmeUtils;
diff --git a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/utils/AuthmeUtils.java b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/utils/AuthmeUtils.java
index 64f78a1..4e6ffc8 100644
--- a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/utils/AuthmeUtils.java
+++ b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/utils/AuthmeUtils.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.velocity.utils;
 
 import java.util.List;
diff --git a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/utils/Pair.java b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/utils/Pair.java
index 8ae66c8..8c17ced 100644
--- a/velocity/src/main/java/me/adrianed/authmevelocity/velocity/utils/Pair.java
+++ b/velocity/src/main/java/me/adrianed/authmevelocity/velocity/utils/Pair.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2023 AuthMeVelocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package me.adrianed.authmevelocity.velocity.utils;
 
 public record Pair<O>(String string, O object) {