diff --git a/backend/v3/storage/database/dialect/postgres/migration/migrationgs.go b/backend/v3/storage/database/dialect/postgres/migration/migrations.go
similarity index 100%
rename from backend/v3/storage/database/dialect/postgres/migration/migrationgs.go
rename to backend/v3/storage/database/dialect/postgres/migration/migrations.go
diff --git a/backend/v3/storage/database/dialect/postgres/migration/migrationgs_test.go b/backend/v3/storage/database/dialect/postgres/migration/migrations_test.go
similarity index 100%
rename from backend/v3/storage/database/dialect/postgres/migration/migrationgs_test.go
rename to backend/v3/storage/database/dialect/postgres/migration/migrations_test.go
diff --git a/backend/v3/storage/database/dialect/postgres/pool.go b/backend/v3/storage/database/dialect/postgres/pool.go
index 275be54e11e..25a2caa39e3 100644
--- a/backend/v3/storage/database/dialect/postgres/pool.go
+++ b/backend/v3/storage/database/dialect/postgres/pool.go
@@ -86,6 +86,7 @@ func (p *pgxPool) Migrate(ctx context.Context) error {
 	if err != nil {
 		return err
 	}
+	defer client.Release()
 
 	err = migration.Migrate(ctx, client.Conn())
 	isMigrated = err == nil
@@ -98,6 +99,7 @@ func (p *pgxPool) MigrateTest(ctx context.Context) error {
 	if err != nil {
 		return err
 	}
+	defer client.Release()
 
 	err = migration.Migrate(ctx, client.Conn())
 	isMigrated = err == nil