diff --git a/app/chain/system.py b/app/chain/system.py
index 54e110821..c5581aa75 100644
--- a/app/chain/system.py
+++ b/app/chain/system.py
@@ -608,7 +608,7 @@ class SystemChain(_SystemUpdateChain):
             )
             if response:
                 try:
-                    releases = [release['tag_name'] for release in response.json()]
+                    releases: list[str] = [release['tag_name'] for release in response.json()]
                     v3_releases = [tag for tag in releases if re.match(r"^v3\.", tag)]
                     if not v3_releases:
                         logger.warning("获取v3后端最新版本出错！")
@@ -640,7 +640,7 @@ class SystemChain(_SystemUpdateChain):
             )
             if response:
                 try:
-                    releases = [release['tag_name'] for release in response.json()]
+                    releases: list[str] = [release['tag_name'] for release in response.json()]
                     v3_releases = [tag for tag in releases if re.match(r"^v3\.", tag)]
                     if not v3_releases:
                         logger.warning("获取v3前端最新版本出错！")
diff --git a/tests/fixtures/architecture/mypy-baseline.json b/tests/fixtures/architecture/mypy-baseline.json
index b9b4689fe..012565895 100644
--- a/tests/fixtures/architecture/mypy-baseline.json
+++ b/tests/fixtures/architecture/mypy-baseline.json
@@ -951,8 +951,8 @@
   },
   "app/chain/system.py": {
     "attr-defined": 1,
-    "no-untyped-call": 3,
-    "no-untyped-def": 11
+    "no-untyped-call": 1,
+    "no-untyped-def": 9
   },
   "app/chain/theaudiodb.py": {
     "type-arg": 1