diff --git a/backend/cmd/master.go b/backend/cmd/master.go
index 2e739d29..bd9974aa 100644
--- a/backend/cmd/master.go
+++ b/backend/cmd/master.go
@@ -44,7 +44,8 @@ which runs api and assign tasks to worker nodes`,
 				fmt.Println(fmt.Sprintf("invalid grpc-address: %s", masterGrpcAddress))
 			}
 			opts = append(opts, apps.WithMasterGrpcAddress(address))
-			viper.Set("grpc.client.address", masterGrpcAddress)
+			viper.Set("grpc.address", masterGrpcAddress)
+			viper.Set("grpc.server.address", masterGrpcAddress)
 		}
 
 		// app
diff --git a/backend/cmd/worker.go b/backend/cmd/worker.go
index 93a6ca1d..8930f478 100644
--- a/backend/cmd/worker.go
+++ b/backend/cmd/worker.go
@@ -44,7 +44,7 @@ assigned by the master node`,
 				return
 			}
 			opts = append(opts, apps.WithWorkerGrpcAddress(address))
-			viper.Set("grpc.client.address", workerGrpcAddress)
+			viper.Set("grpc.address", workerGrpcAddress)
 		}
 
 		// app
diff --git a/backend/conf/config.yml b/backend/conf/config.yml
index 302fe70f..d4c59e32 100644
--- a/backend/conf/config.yml
+++ b/backend/conf/config.yml
@@ -65,6 +65,7 @@ notification:
 config:
   path: ''
 grpc:
-  client:
-    address: localhost:9666
+  address: localhost:9666
+  server:
+    address: 0.0.0.0:9666
   authKey: Crawlab2021!
\ No newline at end of file