diff --git a/lib/controller.ts b/lib/controller.ts
index 3e61b621..92a9751a 100644
--- a/lib/controller.ts
+++ b/lib/controller.ts
@@ -149,7 +149,7 @@ class Controller {
         }
 
         // Call extensions
-        await this.callExtensions('start', this.extensions);
+        await this.callExtensions('start', [...this.extensions]);
 
         // Send all cached states.
         if (settings.get().advanced.cache_state_send_on_startup && settings.get().advanced.cache_state) {