diff --git a/system/scripts/dice/gm-tools-dialog.js b/system/scripts/dice/gm-tools-dialog.js
index 8294d41..baf2e9b 100644
--- a/system/scripts/dice/gm-tools-dialog.js
+++ b/system/scripts/dice/gm-tools-dialog.js
@@ -43,6 +43,14 @@ export class GmToolsDialog extends FormApplication {
         };
     }
 
+    /**
+     * Do not close this dialog
+     * @override
+     */
+    close() {
+        // nothing !
+    }
+
     /**
      * Prevent non GM to render this windows
      * @override