diff --git a/main.js b/main.js
index 0f53b1d..309c541 100644
--- a/main.js
+++ b/main.js
@@ -23,6 +23,11 @@ module.exports = class RibbonOrderLock extends Plugin {
     });
   }
 
+  onunload() {
+    this.observer?.disconnect();
+    this.app.workspace.leftRibbon.onChange = this.originalOnChange;
+  }
+
   observeRibbon() {
     const ribbon = this.app.workspace.leftRibbon;
     const containerEl = ribbon.ribbonItemsEl;