diff --git a/package.json b/package.json
index 648557d..fdf5669 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cosmos-server",
-  "version": "0.10.4-unstable2",
+  "version": "0.10.4-unstable3",
   "description": "",
   "main": "test-server.js",
   "bugs": {
diff --git a/src/authorizationserver/oauth2_token.go b/src/authorizationserver/oauth2_token.go
index 755a7a6..9301373 100644
--- a/src/authorizationserver/oauth2_token.go
+++ b/src/authorizationserver/oauth2_token.go
@@ -1,7 +1,6 @@
 package authorizationserver
 
 import (
-	"log"
 	"net/http"
 	// "fmt"
 
@@ -23,7 +22,7 @@ func tokenEndpoint(rw http.ResponseWriter, req *http.Request) {
 	// * invalid redirect
 	// * ...
 	if err != nil {
-		utils.Log("Error occurred in NewAccessRequest", err)
+		utils.Error("Error occurred in NewAccessRequest", err)
 		oauth2.WriteAccessError(ctx, rw, accessRequest, err)
 		return
 	}
@@ -41,7 +40,7 @@ func tokenEndpoint(rw http.ResponseWriter, req *http.Request) {
 	// and aggregate the result in response.
 	response, err := oauth2.NewAccessResponse(ctx, accessRequest)
 	if err != nil {
-		utils.Log("Error occurred in NewAccessResponse", err)
+		utils.Error("Error occurred in NewAccessResponse", err)
 		oauth2.WriteAccessError(ctx, rw, accessRequest, err)
 		return
 	}