diff --git a/defaults/main.yml b/defaults/main.yml
index a008a4a..723b705 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -105,7 +105,7 @@ psql_streaming_replication_config:
   - { name: 'wal_level', value: 'replica' }
   - { name: 'max_wal_senders', value: '10' }
   - { name: 'wal_keep_size', value: '0' }
-  - { name: 'max_slot_wal_keep_size', value: '15' }
+  - { name: 'max_slot_wal_keep_size', value: '50MB' }
   - { name: 'wal_compression', value: 'on' }
   - { name: 'wal_log_hints', value: 'on' }
   - { name: 'hot_standby', value: 'on' }