diff --git a/src/main/java/exopandora/worldhandler/util/MutableTextComponent.java b/src/main/java/exopandora/worldhandler/util/MutableTextComponent.java
index 37bf565..5da2828 100644
--- a/src/main/java/exopandora/worldhandler/util/MutableTextComponent.java
+++ b/src/main/java/exopandora/worldhandler/util/MutableTextComponent.java
@@ -1,5 +1,7 @@
 package exopandora.worldhandler.util;
 
+import javax.annotation.Nullable;
+
 import net.minecraft.ChatFormatting;
 import net.minecraft.nbt.StringTag;
 import net.minecraft.nbt.Tag;
@@ -69,6 +71,7 @@ public class MutableTextComponent extends TextComponent
 		return FormattedCharSequence.forward(string, this.getStyle());
 	}
 	
+	@Nullable
 	public Tag serialize()
 	{
 		if(this.getContents() != null && !this.getContents().isEmpty())
diff --git a/src/main/java/exopandora/worldhandler/util/SignText.java b/src/main/java/exopandora/worldhandler/util/SignText.java
index 175a4d0..8766a25 100644
--- a/src/main/java/exopandora/worldhandler/util/SignText.java
+++ b/src/main/java/exopandora/worldhandler/util/SignText.java
@@ -1,5 +1,6 @@
 package exopandora.worldhandler.util;
 
+import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
 import net.minecraft.nbt.StringTag;
@@ -37,6 +38,7 @@ public class SignText extends MutableTextComponent
 		return this.getStyle().getClickEvent() != null && this.getStyle().getClickEvent().getAction() == Action.RUN_COMMAND && this.getStyle().getClickEvent().getValue() != null;
 	}
 	
+	@Nonnull
 	@Override
 	public Tag serialize()
 	{