diff --git a/eventsourcing/postgres.py b/eventsourcing/postgres.py
index <HASH>..<HASH> 100644
--- a/eventsourcing/postgres.py
+++ b/eventsourcing/postgres.py
@@ -426,7 +426,7 @@ class PostgresApplicationRecorder(
             "originator_version integer NOT NULL, "
             "topic text, "
             "state bytea, "
-            "notification_id SERIAL, "
+            "notification_id BIGSERIAL, "
             "PRIMARY KEY "
             "(originator_id, originator_version)) "
             "WITH (autovacuum_enabled=false)",
Changed notification_id from SERIAL to BIGSERIAL.