diff --git a/scripts/runtime/msai_runtime.py b/scripts/runtime/msai_runtime.py
index 700bca5..625c385 100644
--- a/scripts/runtime/msai_runtime.py
+++ b/scripts/runtime/msai_runtime.py
@@ -867,9 +867,11 @@ class MiaoshouRuntime(object):
             repo.git.reset('origin', hard=True)
             if not dont_update_ms:
                 print('Updating model source...')
-                repo = git.Repo(self.prelude.asset_folder)
-                repo.git.fetch(all=True)
-                repo.git.reset('origin', hard=True)
+                for submodule in repo.submodules:
+                    submodule.update(init=True)
+                sub_repo = git.Repo(self.prelude.asset_folder)
+                sub_repo.git.fetch(all=True)
+                sub_repo.git.reset('origin', hard=True)
                 self.install_preset_models_if_needed(True)
         except Exception as e:
             result = str(e)