diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 62186cc..a49a86b 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -1,5 +1,6 @@
 ## Contributors
 
+-   [giuppep](https://github.com/giuppep)
 -   [eiriklid](https://github.com/eiriklid)
 -   [necat1](https://github.com/necat1)
 -   [nebolax](https://github.com/nebolax)
diff --git a/src/flask_session/postgresql/postgresql.py b/src/flask_session/postgresql/postgresql.py
index 9ad198b..9094e00 100644
--- a/src/flask_session/postgresql/postgresql.py
+++ b/src/flask_session/postgresql/postgresql.py
@@ -117,7 +117,7 @@ def _retrieve_session_data(self, store_id: str) -> Optional[dict]:
 
         if session_data is not None:
             serialized_session_data = want_bytes(session_data[0])
-            return self.serializer.decode(serialized_session_data)
+            return self.serializer.loads(serialized_session_data)
         return None
 
     @retry_query(max_attempts=3)
@@ -125,7 +125,7 @@ def _upsert_session(
         self, session_lifetime: TimeDelta, session: ServerSideSession, store_id: str
     ) -> None:
 
-        serialized_session_data = self.serializer.encode(session)
+        serialized_session_data = self.serializer.dumps(session)
 
         if session.sid is not None:
             assert session.sid == store_id.removeprefix(self.key_prefix)