diff --git a/src/main/java/dev/tylerm/khs/gui/SkillSelectionGUI.java b/src/main/java/dev/tylerm/khs/gui/SkillSelectionGUI.java
index 6abe8af..20871c1 100644
--- a/src/main/java/dev/tylerm/khs/gui/SkillSelectionGUI.java
+++ b/src/main/java/dev/tylerm/khs/gui/SkillSelectionGUI.java
@@ -56,7 +56,7 @@ void onClick(InventoryClickEvent event) {
                 return;
             }
             event.setCancelled(true);
-            if(event.getRawSlot() > gui.skills.size())return;
+            if(event.getRawSlot() < 0 || event.getRawSlot() > gui.skills.size())return;
             var skill = gui.skills.get(event.getRawSlot());
             if (skill == null) {
                 return;