diff --git a/src/main/java/de/marhali/easyi18n/util/IOUtil.java b/src/main/java/de/marhali/easyi18n/util/IOUtil.java
index ac569b6..a83629d 100644
--- a/src/main/java/de/marhali/easyi18n/util/IOUtil.java
+++ b/src/main/java/de/marhali/easyi18n/util/IOUtil.java
@@ -15,6 +15,7 @@ import java.io.File;
  * IO operations utility.
  * @author marhali
  */
+@Deprecated
 public class IOUtil {
 
     /**
diff --git a/src/main/java/de/marhali/easyi18n/util/array/ArrayUtil.java b/src/main/java/de/marhali/easyi18n/util/array/ArrayUtil.java
index 2360e22..c13e57c 100644
--- a/src/main/java/de/marhali/easyi18n/util/array/ArrayUtil.java
+++ b/src/main/java/de/marhali/easyi18n/util/array/ArrayUtil.java
@@ -13,6 +13,7 @@ import java.util.regex.Pattern;
  * Utility methods for simple array support.
  * @author marhali
  */
+@Deprecated
 public abstract class ArrayUtil {
 
     static final String PREFIX = "!arr[";
diff --git a/src/main/java/de/marhali/easyi18n/util/array/JsonArrayUtil.java b/src/main/java/de/marhali/easyi18n/util/array/JsonArrayUtil.java
index d61969c..8905c1f 100644
--- a/src/main/java/de/marhali/easyi18n/util/array/JsonArrayUtil.java
+++ b/src/main/java/de/marhali/easyi18n/util/array/JsonArrayUtil.java
@@ -7,6 +7,7 @@ import com.google.gson.JsonElement;
  * Utility methods to read and write json arrays.
  * @author marhali
  */
+@Deprecated
 public class JsonArrayUtil extends ArrayUtil {
     public static String read(JsonArray array) {
         return read(array.iterator(), JsonElement::getAsString);