diff --git a/lib/plugin.js b/lib/plugin.js
index 9ddee8c..e0523eb 100644
--- a/lib/plugin.js
+++ b/lib/plugin.js
@@ -4,8 +4,6 @@ import Axios from 'axios'
 // Axios.prototype cannot be modified
 const axiosExtra = {
   setHeader (name, value, scopes = 'common') {
-    name = name.toLowerCase()
-
     for (let scope of Array.isArray(scopes) ? scopes : [ scopes ]) {
       if (!value) {
         delete this.defaults.headers[scope][name];
@@ -16,7 +14,7 @@ const axiosExtra = {
   },
   setToken (token, type, scopes = 'common') {
     const value = !token ? null : (type ? type + ' ' : '') + token
-    this.setHeader('authorization', value, scopes)
+    this.setHeader('Authorization', value, scopes)
   },
   onRequest(fn) {
     this.interceptors.request.use(config => fn(config) || config)
diff --git a/test/fixture/pages/ssr.vue b/test/fixture/pages/ssr.vue
index 6b8592b..a7a0a32 100644
--- a/test/fixture/pages/ssr.vue
+++ b/test/fixture/pages/ssr.vue
@@ -12,7 +12,7 @@ let reqCtr = 1
 export default {
   computed: {
     axiosSessionId() {
-      return this.$axios.defaults.headers.common.sessionid
+      return this.$axios.defaults.headers.common.SessionId
     },
 
     axiosEncoding() {
@@ -22,7 +22,7 @@ export default {
   fetch({ app, route }) {
     const doLogin = route.query.login !== undefined
     if (doLogin) {
-      app.$axios.setHeader('sessionId', reqCtr++)
+      app.$axios.setHeader('SessionId', reqCtr++)
     }
   }
 }