diff --git a/src/main/connection_helper.ts b/src/main/connection_helper.ts
index 284cd982..0c9396c4 100644
--- a/src/main/connection_helper.ts
+++ b/src/main/connection_helper.ts
@@ -1,6 +1,6 @@
 import { LogHelper } from "./log_helper";
 import {
-  WebWorkerRequest, EventQueue, API, WebWorkerResult,
+  WebWorkerRequest, API, WebWorkerResult,
   EVENT, promise, IDataBase, IDbInfo, TMiddleware,
   promiseResolve
 } from "../common";
diff --git a/src/worker/query_manager.ts b/src/worker/query_manager.ts
index bc374c12..7d73fd8e 100644
--- a/src/worker/query_manager.ts
+++ b/src/worker/query_manager.ts
@@ -318,8 +318,8 @@ export class QueryManager {
                             this.util
                         ).then(() => {
                             res(dbInfo);
-                        });
-                    });
+                        }).catch(rej);
+                    }).catch(rej);
                 }
                 else {
                     MetaHelper.get(
@@ -329,7 +329,7 @@ export class QueryManager {
                         this.util.db = value;
                         dbInfo.database = userDbSchema(this.db);
                         res(dbInfo);
-                    });
+                    }).catch(rej)
                 }
             }).catch(rej);
         });