diff --git a/basic/basic_test.go b/back/basic/basic_test.go
similarity index 100%
rename from basic/basic_test.go
rename to back/basic/basic_test.go
diff --git a/basic/basiccheck.go b/back/basic/basiccheck.go
similarity index 100%
rename from basic/basiccheck.go
rename to back/basic/basiccheck.go
diff --git a/network/network.go b/back/network/network.go
similarity index 100%
rename from network/network.go
rename to back/network/network.go
diff --git a/network/network_test.go b/back/network/network_test.go
similarity index 100%
rename from network/network_test.go
rename to back/network/network_test.go
diff --git a/port/port.go b/back/port/port.go
similarity index 100%
rename from port/port.go
rename to back/port/port.go
diff --git a/port/port_test.go b/back/port/port_test.go
similarity index 100%
rename from port/port_test.go
rename to back/port/port_test.go
diff --git a/goecs.go b/goecs.go
index e2cd85c..43a0d5b 100644
--- a/goecs.go
+++ b/goecs.go
@@ -39,7 +39,7 @@ import (
 )
 
 var (
-	ecsVersion                                                        = "v0.1.20"
+	ecsVersion                                                        = "v0.1.21"
 	menuMode                                                          bool
 	onlyChinaTest                                                     bool
 	input, choice                                                     string
diff --git a/goecs.sh b/goecs.sh
index c25631a..b5cd2fd 100644
--- a/goecs.sh
+++ b/goecs.sh
@@ -139,8 +139,8 @@ goecs_check() {
         sleep 1
     done
     if [ -z "$ECS_VERSION" ]; then
-        _yellow "Unable to get version info, using default version 0.1.19"
-        ECS_VERSION="0.1.19"
+        _yellow "Unable to get version info, using default version 0.1.21"
+        ECS_VERSION="0.1.21"
     fi
     # Check if original goecs command exists
     version_output=""