diff --git a/modules/api/api.py b/modules/api/api.py
index 2e49526e3..7f7e3a9b1 100644
--- a/modules/api/api.py
+++ b/modules/api/api.py
@@ -593,7 +593,8 @@ class Api:
         }
 
     def refresh_checkpoints(self):
-        shared.refresh_checkpoints()
+        with self.queue_lock:
+            shared.refresh_checkpoints()
 
     def create_embedding(self, args: dict):
         try: