diff --git a/actions/upgrades b/actions/upgrades
index 9aa3f8c3c..45c20c7d3 100755
--- a/actions/upgrades
+++ b/actions/upgrades
@@ -50,6 +50,11 @@ Explanation: matrix-synapse >= 1.47.0-2 requires python3-frozendict >= 1.2-3
 Package: python3-frozendict
 Pin: release a=bullseye-backports
 Pin-Priority: 500
+
+Explanation: matrix-synapse >= 1.55.0-1 requires python3-typing-extensions >= 3.10
+Package: python3-typing-extensions
+Pin: release a=bullseye-backports
+Pin-Priority: 500
 '''
 
 DIST_UPGRADE_OBSOLETE_PACKAGES: List[str] = []
diff --git a/plinth/modules/upgrades/__init__.py b/plinth/modules/upgrades/__init__.py
index 42b579b6a..634493de0 100644
--- a/plinth/modules/upgrades/__init__.py
+++ b/plinth/modules/upgrades/__init__.py
@@ -62,7 +62,7 @@ class UpgradesApp(app_module.App):
 
     app_id = 'upgrades'
 
-    _version = 11
+    _version = 12
 
     can_be_disabled = False