diff --git a/lib/charms/mongodb/v0/config_server_interface.py b/lib/charms/mongodb/v0/config_server_interface.py
index 7d863d7e1..acb23df00 100644
--- a/lib/charms/mongodb/v0/config_server_interface.py
+++ b/lib/charms/mongodb/v0/config_server_interface.py
@@ -42,7 +42,7 @@
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 10
+LIBPATCH = 11
 
 
 class ClusterProvider(Object):
@@ -378,7 +378,7 @@ def get_tls_statuses(self) -> Optional[StatusBase]:
             )
             return BlockedStatus("mongos CA and Config-Server CA don't match.")
 
-        return
+        return None
 
     def get_config_server_name(self) -> Optional[str]:
         """Returns the name of the Juju Application that mongos is using as a config server."""