diff --git a/cookbooks/digdag/files/etc/digdag/digdag.config b/cookbooks/digdag/files/etc/digdag/digdag.config
index c7ba253..c4d9c05 100644
--- a/cookbooks/digdag/files/etc/digdag/digdag.config
+++ b/cookbooks/digdag/files/etc/digdag/digdag.config
@@ -4,3 +4,4 @@ database.password=Holiday88
 database.host=192.168.10.200
 database.port=15432
 database.database=digdag
+database.maximumPoolSize=32