diff --git a/port.py b/port.py
index af80f34..cf1dd36 100644
--- a/port.py
+++ b/port.py
@@ -766,15 +766,16 @@ class Portainer:
         return True
 
     def stop_stack(self, stack, endpoint_id):
+        
         """Stop one stack or all stacks on an endpoint."""
         print(f"Stopping stack {stack}")
+        
         if endpoint_id is not None:
             self.get_endpoint(endpoint_id)
-        if stack == "all":
-            self.get_stack(stack, endpoint_id)
-        else:
-            if stack is not None:
-                self.stack_ids = [self._resolve_stack_id(stack, endpoint_id)]
+
+        if stack is not None:
+            for s in stack:
+                self.stack_ids = [self._resolve_stack_id(s, endpoint_id)]
         # print(self.stack_ids)
         for stck in self.stack_ids:
             path = f"/stacks/{stck}/stop"