diff --git a/go.mod b/go.mod
index 5955e31..0bae577 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,7 @@ go 1.12
 
 require (
 	github.com/gosimple/slug v1.7.0
+	github.com/iancoleman/strcase v0.0.0-20190422225806-e506e3ef7365
 	github.com/rainycape/unidecode v0.0.0-20150907023854-cb7f23ec59be // indirect
 	github.com/spf13/cobra v0.0.5
 	github.com/stretchr/testify v1.4.0
diff --git a/go.sum b/go.sum
index 1eed9ac..cc9823e 100644
--- a/go.sum
+++ b/go.sum
@@ -15,6 +15,8 @@ github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 h1:2VTzZjLZBgl62/EtslC
 github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542/go.mod h1:Ow0tF8D4Kplbc8s8sSb3V2oUCygFHVp8gC3Dn6U4MNI=
 github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
+github.com/iancoleman/strcase v0.0.0-20190422225806-e506e3ef7365 h1:ECW73yc9MY7935nNYXUkK7Dz17YuSUI9yqRqYS8aBww=
+github.com/iancoleman/strcase v0.0.0-20190422225806-e506e3ef7365/go.mod h1:SK73tn/9oHe+/Y0h39VT4UCxmurVJkR5NA7kMEAOgSE=
 github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/magiconair/properties v1.8.0 h1:LLgXmsheXeRoUOBOjtwPQCWIYqM/LU1ayDtDePerRcY=
diff --git a/pkg/grafana/rest-client.go b/pkg/grafana/rest-client.go
index fe05946..dfd9b19 100644
--- a/pkg/grafana/rest-client.go
+++ b/pkg/grafana/rest-client.go
@@ -8,9 +8,9 @@ import (
 	"net/http"
 	"net/url"
 	"path"
-	"strings"
 
 	"github.com/gosimple/slug"
+	"github.com/iancoleman/strcase"
 )
 
 type RestClient struct {
@@ -87,7 +87,7 @@ func (r *RestClient) GetAllDatasources() ([]*DataSource, error) {
 		for key, value := range ds.SecureJsonFields {
 			if value {
 				sanitized := slug.Make(fmt.Sprintf("%s_%s", ds.Name, key))
-				placeholder := strings.ToUpper("$" + sanitized)
+				placeholder := strcase.ToScreamingSnake("$" + sanitized)
 				if existedEnv[placeholder] {
 					// duplicated env existed
 					return nil, fmt.Errorf("Duplicated ENV variable: `%s`. Rename `%s` datasource", placeholder, ds.Name)
diff --git a/pkg/grafana/rest-client_test.go b/pkg/grafana/rest-client_test.go
index caf91c3..61738a5 100644
--- a/pkg/grafana/rest-client_test.go
+++ b/pkg/grafana/rest-client_test.go
@@ -51,7 +51,7 @@ func TestGetAllDatasources(t *testing.T) {
 	assert.Equal(1, len(datasources))
 	actualDatasource := datasources[0]
 	assert.Equal(1, len(actualDatasource.SecureJsonData))
-	assert.Equal("$GDEV-INFLUXDB-TELEGRAF_PASSWORD", actualDatasource.SecureJsonData["password"])
+	assert.Equal("$GDEV_INFLUXDB_TELEGRAF_PASSWORD", actualDatasource.SecureJsonData["password"])
 }
 
 func TestIncompleteHost(t *testing.T) {
diff --git a/pkg/grafana/testdata/datasources-1.golden.json b/pkg/grafana/testdata/datasources-1.golden.json
index 7990670..d99bc0c 100644
--- a/pkg/grafana/testdata/datasources-1.golden.json
+++ b/pkg/grafana/testdata/datasources-1.golden.json
@@ -9,7 +9,7 @@
   "jsonData": {
     "timeInterval": "10s"
   },
-  "name": "gdev-influxdb-telegraf",
+  "name": "gdev-influxdb-telegraf😀",
   "orgId": 1,
   "password": "",
   "readOnly": true,