diff --git a/robotics_application_manager/manager/launcher/launcher_o3de_api.py b/robotics_application_manager/manager/launcher/launcher_o3de_api.py
index e6f2ade..d8803d0 100644
--- a/robotics_application_manager/manager/launcher/launcher_o3de_api.py
+++ b/robotics_application_manager/manager/launcher/launcher_o3de_api.py
@@ -71,7 +71,7 @@ def run(self, callback):
     def terminate(self):
         self.gz_vnc.terminate()
         if self.threads is not None:
-            for thread in self.threads:
+            for thread in self.threads[:]:
                 if thread.is_alive():
                     thread.terminate()
                     thread.join()
diff --git a/robotics_application_manager/manager/vnc/vnc_server.py b/robotics_application_manager/manager/vnc/vnc_server.py
index da05946..c554299 100755
--- a/robotics_application_manager/manager/vnc/vnc_server.py
+++ b/robotics_application_manager/manager/vnc/vnc_server.py
@@ -153,7 +153,7 @@ def is_running(self):
 
     def terminate(self):
         """Terminate all running threads and stop the VNC server."""
-        for thread in self.threads:
+        for thread in self.threads[:]:
             if thread.is_alive():
                 thread.terminate()
                 thread.join()