diff --git a/portainer/api.py b/portainer/api.py
index 92ea35a..2f16a61 100644
--- a/portainer/api.py
+++ b/portainer/api.py
@@ -1215,7 +1215,7 @@ class PortainerApi:
 
         if stack is not None:
             for s in stack:
-                self.stack_ids = [self._resolve_stack_id(s, endpoint_id)]
+                self.stack_ids.append(self._resolve_stack_id(s, endpoint_id))
         # print(self.stack_ids)
         for stck in self.stack_ids:
             path = f"/stacks/{stck}/stop"