diff --git a/packages/midway-component-kmore/src/lib/db-source-manager.ts b/packages/midway-component-kmore/src/lib/db-source-manager.ts
index d89ff5b5..e1243f7a 100644
--- a/packages/midway-component-kmore/src/lib/db-source-manager.ts
+++ b/packages/midway-component-kmore/src/lib/db-source-manager.ts
@@ -150,7 +150,7 @@ export class DbManager<SourceName extends string = string, D extends object = ob
     return 'dbManager'
   }
 
-  protected async checkConnected(dataSource: Kmore): Promise<boolean> {
+  async checkConnected(dataSource: Kmore): Promise<boolean> {
     // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
     if (! dataSource) {
       return false