diff --git a/store/datastore/ddl/migrate.go b/store/datastore/ddl/migrate.go
index 2b716222..0002d00c 100644
--- a/store/datastore/ddl/migrate.go
+++ b/store/datastore/ddl/migrate.go
@@ -99,7 +99,7 @@ INSERT IGNORE INTO migrations (name) VALUES
 
 var createMigrationsTable = `
 CREATE TABLE IF NOT EXISTS migrations (
- name VARCHAR(512)
+ name VARCHAR(255)
 ,UNIQUE(name)
 )
 `
diff --git a/store/datastore/ddl/mysql/ddl_gen.go b/store/datastore/ddl/mysql/ddl_gen.go
index 1bc3d923..cc4e9f3b 100644
--- a/store/datastore/ddl/mysql/ddl_gen.go
+++ b/store/datastore/ddl/mysql/ddl_gen.go
@@ -150,7 +150,7 @@ func selectCompleted(db *sql.DB) (map[string]struct{}, error) {
 
 var migrationTableCreate = `
 CREATE TABLE IF NOT EXISTS migrations (
- name VARCHAR(512)
+ name VARCHAR(255)
 ,UNIQUE(name)
 )
 `