diff --git a/common/api/src/main/java/com/dfsek/terra/api/util/JarUtil.java b/common/api/src/main/java/com/dfsek/terra/api/util/JarUtil.java
index 569c46cd6..051f1aa75 100644
--- a/common/api/src/main/java/com/dfsek/terra/api/util/JarUtil.java
+++ b/common/api/src/main/java/com/dfsek/terra/api/util/JarUtil.java
@@ -12,7 +12,7 @@ import java.util.Enumeration;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 
-public class JarUtil {
+public final class JarUtil {
     public static void copyResourcesToDirectory(JarFile fromJar, String sourceDir, String destDir) throws IOException {
         for(Enumeration<JarEntry> entries = fromJar.entries(); entries.hasMoreElements(); ) {
             JarEntry entry = entries.nextElement();
diff --git a/common/api/src/main/java/com/dfsek/terra/api/util/ReflectionUtil.java b/common/api/src/main/java/com/dfsek/terra/api/util/ReflectionUtil.java
index 32af3500b..754fc1793 100644
--- a/common/api/src/main/java/com/dfsek/terra/api/util/ReflectionUtil.java
+++ b/common/api/src/main/java/com/dfsek/terra/api/util/ReflectionUtil.java
@@ -11,7 +11,7 @@ import java.util.Arrays;
 import java.util.function.Consumer;
 import java.util.stream.Stream;
 
-public class ReflectionUtil {
+public final class ReflectionUtil {
     public static Field[] getFields(@NotNull Class<?> type) {
         Field[] result = type.getDeclaredFields();
         Class<?> parentClass = type.getSuperclass();
diff --git a/common/api/src/main/java/com/dfsek/terra/api/util/RotationUtil.java b/common/api/src/main/java/com/dfsek/terra/api/util/RotationUtil.java
index 013b8a8d1..2d949d3e0 100644
--- a/common/api/src/main/java/com/dfsek/terra/api/util/RotationUtil.java
+++ b/common/api/src/main/java/com/dfsek/terra/api/util/RotationUtil.java
@@ -11,7 +11,7 @@ import com.dfsek.terra.api.block.state.properties.enums.WallHeight;
 import com.dfsek.terra.api.structure.rotation.Rotation;
 import com.dfsek.terra.api.vector.Vector2;
 
-public class RotationUtil {
+public final class RotationUtil {
 
     /**
      * Rotate and mirror a coordinate pair.