diff --git a/gui/base/src/main/java/it/angrybear/yagl/guis/ResizableGUI.java b/gui/base/src/main/java/it/angrybear/yagl/guis/ResizableGUI.java
index fad19752..43e4106d 100644
--- a/gui/base/src/main/java/it/angrybear/yagl/guis/ResizableGUI.java
+++ b/gui/base/src/main/java/it/angrybear/yagl/guis/ResizableGUI.java
@@ -5,6 +5,7 @@
 import it.angrybear.yagl.actions.BiGUIAction;
 import it.angrybear.yagl.actions.GUIAction;
 import it.angrybear.yagl.contents.GUIContent;
+import it.angrybear.yagl.contents.ItemGUIContent;
 import it.angrybear.yagl.items.Item;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -117,11 +118,21 @@ private void checkSize(int size) {
         return (ResizableGUI) super.addContent(contents);
     }
 
+    @Override
+    public @NotNull ResizableGUI addContent(ItemGUIContent @NotNull ... contents) {
+        return (ResizableGUI) super.addContent(contents);
+    }
+
     @Override
     public @NotNull ResizableGUI setContents(int slot, Item @NotNull ... contents) {
         return (ResizableGUI) super.setContents(slot, contents);
     }
 
+    @Override
+    public @NotNull ResizableGUI setContents(int slot, ItemGUIContent @NotNull ... contents) {
+        return (ResizableGUI) super.setContents(slot, contents);
+    }
+
     @Override
     public @NotNull ResizableGUI onClickOutside(@NotNull String command) {
         return (ResizableGUI) super.onClickOutside(command);