diff --git a/hmac_v1_sign.go b/hmac_v1_sign.go
index b06e5fc..ca62094 100644
--- a/hmac_v1_sign.go
+++ b/hmac_v1_sign.go
@@ -244,6 +244,7 @@ func (ctx *signingCtx) buildCanonicalString() {
 		uri = ctx.URL.EscapedPath()
 	}
 
+	ctx.URL.RawQuery = strings.Replace(ctx.Query.Encode(), "+", "%20", -1)
 	ctx.canonicalString = strings.Join([]string{
 		ctx.Method,
 		uri,
diff --git a/hmac_v1_test.go b/hmac_v1_test.go
index e82bccb..1f857e3 100644
--- a/hmac_v1_test.go
+++ b/hmac_v1_test.go
@@ -1,6 +1,7 @@
 package signer
 
 import (
+	"bytes"
 	"encoding/json"
 	"net/http"
 	"net/url"
@@ -46,6 +47,35 @@ func TestSignPutRequest(t *testing.T) {
 	assert.True(t, validator.Verify(req), "Expect is true")
 }
 
+func TestCSharpValidator(t *testing.T) {
+	b := `{"name":"config_appsettings","env":"Development","attrs":{"mysql_profile":"mysql","mysql_db":"feiniubus_app_version","mysql_env":"Development","redis_profile":"redis","redis_db":"2","redis_env":"Development","mongo_profile":"mongo","mongo_env":"Development","mongo_db":"system_config"},"lang":"CSharp"}`
+	uri, _ := url.Parse("http://172.16.2.117:5100/cc/v1/fetch")
+
+	header := make(http.Header)
+	header.Set("Accept", "application/json")
+	header.Set("Host", "172.16.2.117:5100")
+	header.Set("User-Agent", "Polaris-sdk-dotnet-coreclr/.NET_CORE/4.6.00001.0 OS/Darwin_17.2.0_Darwin_Kernel_Version_17.2.0:_Fri_Sep_29_18:27:05_PDT_2017;_root:xnu-4570.20.62~3/RELEASE_X86_64")
+	header.Set("Connection", "keep-alive")
+	header.Set("Accept-Encoding", "gzip")
+	header.Set("X-FeiniuBus-Date", "20171121T104103Z")
+	header.Set("Content-Type", "application/json")
+	header.Set("Content-Length", "302")
+	header.Set("Authorization", "FNBUS1-HMAC-SHA256 Credential=11E7BEAB19F97FF1878AFA163EE05ADE/20171121/feiniubus_request,SignedHeaders=accept;accept-encoding;connection;content-type;host;user-agent,Signature=6b4ec6f5d845aa5b0587ff64d0448fdc41393c8977f471c7a7f14503a8dc12e1")
+
+	req := &Request{
+		Body:   bytes.NewReader([]byte(b)),
+		URL:    uri,
+		Method: "POST",
+		Header: header,
+	}
+
+	validator := NewHMACValidatorV1(func(id string) (string, error) {
+		return "3a57527a8b38f4ddf86609cfba26f86bef045186d59b4994487437947ba733d2", nil
+	})
+
+	assert.True(t, validator.Verify(req), "Expect is true")
+}
+
 func TestValidator(t *testing.T) {
 	b := body{
 		Name: "xqlun",
@@ -68,8 +98,8 @@ func TestValidator(t *testing.T) {
 
 func TestSignGetRequest(t *testing.T) {
 	values := url.Values{}
-	values.Set("id", "uuid")
-	values.Set("type", "Topic")
+	values.Set("type", "uuid")
+	values.Set("id", "Topic")
 
 	req := buildGetRequest(values)
 	signer := buildSigner()
diff --git a/hmac_v1_verify.go b/hmac_v1_verify.go
index dfccfc8..23ead40 100644
--- a/hmac_v1_verify.go
+++ b/hmac_v1_verify.go
@@ -161,6 +161,7 @@ func (ctx *verifyCtx) buildCanonicalString() {
 		uri = ctx.URL.EscapedPath()
 	}
 
+	ctx.URL.RawQuery = ctx.Query.Encode()
 	ctx.canonicalString = strings.Join([]string{
 		ctx.Method,
 		uri,