diff --git a/pyproject.toml b/pyproject.toml
index 53d47e6f5..3ce622298 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -111,7 +111,7 @@ dev = [
   "coverage",
   "coveralls",
   "fakeredis==2.26.*",
-  "flake8==7.1.*",
+  "flake8==7.2.*",
   "freezegun",
   "isort==6.0.*",
   "pep8-naming==0.14.*",
diff --git a/src/pretix/base/signals.py b/src/pretix/base/signals.py
index 71a920b59..7b996cffe 100644
--- a/src/pretix/base/signals.py
+++ b/src/pretix/base/signals.py
@@ -46,7 +46,6 @@ app_cache = {}
 
 
 def _populate_app_cache():
-    global app_cache
     apps.check_apps_ready()
     for ac in apps.app_configs.values():
         app_cache[ac.name] = ac