diff --git a/README.md b/README.md
index 594d1eb2c..e1670b436 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ Go version>=1.13
 
 ### Installation
 ```shell
-go get -u github.com/bilibili/kratos/tool/kratos
+GO111MODULE=on && go get -u github.com/bilibili/kratos/tool/kratos
 cd $GOPATH/src
 kratos new kratos-demo
 ```
diff --git a/pkg/conf/paladin/apollo/apollo.go b/pkg/conf/paladin/apollo/apollo.go
index 0ce83f9de..e30317edd 100644
--- a/pkg/conf/paladin/apollo/apollo.go
+++ b/pkg/conf/paladin/apollo/apollo.go
@@ -96,7 +96,7 @@ func buildConfigForApollo() (c *Config, err error) {
 	if clusterFromEnv := os.Getenv("APOLLO_CLUSTER"); clusterFromEnv != "" {
 		confCluster = clusterFromEnv
 	}
-	if confAppID == "" {
+	if confCluster == "" {
 		err = errors.New("invalid apollo cluster, pass it via APOLLO_CLUSTER=xxx with env or --apollo.cluster=xxx with flag")
 		return
 	}
diff --git a/tool/protobuf/protoc-gen-bswagger/generator.go b/tool/protobuf/protoc-gen-bswagger/generator.go
index b39fe16f2..3552d176e 100644
--- a/tool/protobuf/protoc-gen-bswagger/generator.go
+++ b/tool/protobuf/protoc-gen-bswagger/generator.go
@@ -166,7 +166,7 @@ func (t *swaggerGen) getOperationByHTTPMethod(httpMethod string, pathItem *swagg
 	case http.MethodPut:
 		pathItem.Put = op
 	case http.MethodDelete:
-		pathItem.Put = op
+		pathItem.Delete = op
 	case http.MethodPatch:
 		pathItem.Patch = op
 	default: