diff --git a/src/main/java/com/refinedmods/refinedstorage/util/BlockUtils.java b/src/main/java/com/refinedmods/refinedstorage/util/BlockUtils.java
index e996bbebb..aa25854a1 100644
--- a/src/main/java/com/refinedmods/refinedstorage/util/BlockUtils.java
+++ b/src/main/java/com/refinedmods/refinedstorage/util/BlockUtils.java
@@ -7,7 +7,7 @@ import net.minecraft.block.material.Material;
 import net.minecraft.util.text.ITextComponent;
 import net.minecraft.util.text.TranslationTextComponent;
 
-public class BlockUtils {
+public final class BlockUtils {
     public static final AbstractBlock.Properties DEFAULT_ROCK_PROPERTIES = AbstractBlock.Properties.create(Material.ROCK).hardnessAndResistance(1.9F).sound(SoundType.STONE);
     public static final AbstractBlock.Properties DEFAULT_GLASS_PROPERTIES = AbstractBlock.Properties.create(Material.GLASS).sound(SoundType.GLASS).hardnessAndResistance(0.35F);
 
diff --git a/src/main/java/com/refinedmods/refinedstorage/util/NetworkUtils.java b/src/main/java/com/refinedmods/refinedstorage/util/NetworkUtils.java
index d1b5215d3..10c8a5221 100644
--- a/src/main/java/com/refinedmods/refinedstorage/util/NetworkUtils.java
+++ b/src/main/java/com/refinedmods/refinedstorage/util/NetworkUtils.java
@@ -17,7 +17,7 @@ import net.minecraft.world.World;
 import javax.annotation.Nullable;
 import java.util.function.Consumer;
 
-public class NetworkUtils {
+public final class NetworkUtils {
     private NetworkUtils() {
     }
 
diff --git a/src/main/java/com/refinedmods/refinedstorage/util/PacketBufferUtils.java b/src/main/java/com/refinedmods/refinedstorage/util/PacketBufferUtils.java
index 9a049e844..c1df063cd 100644
--- a/src/main/java/com/refinedmods/refinedstorage/util/PacketBufferUtils.java
+++ b/src/main/java/com/refinedmods/refinedstorage/util/PacketBufferUtils.java
@@ -2,7 +2,7 @@ package com.refinedmods.refinedstorage.util;
 
 import net.minecraft.network.PacketBuffer;
 
-public class PacketBufferUtils {
+public final class PacketBufferUtils {
     private PacketBufferUtils() {
     }