diff --git a/website/filter.py b/website/filter.py
index 37bd371..54b9b05 100644
--- a/website/filter.py
+++ b/website/filter.py
@@ -20,8 +20,8 @@ for index, source in enumerate(source_dir):
         os.makedirs(dst_filepath)
         print(dst_filepath)
         print(dst_filepath + '/index.md')
-        with open(source+chapter, 'r') as source_file:
-            with open(dst_filepath + '/index.md', 'w') as output_file:
+        with open(source+chapter, 'r', encoding='utf-8') as source_file:
+            with open(dst_filepath + '/index.md', 'w', encoding='utf-8') as output_file:
                 for line in source_file:
                     if any(keyword in line for keyword in ignores):
                         continue
diff --git a/website/themes/moderncpp/layout/index.ejs b/website/themes/moderncpp/layout/index.ejs
index 6b16dda..71881e4 100755
--- a/website/themes/moderncpp/layout/index.ejs
+++ b/website/themes/moderncpp/layout/index.ejs
@@ -25,7 +25,7 @@
 
 <div id="footer">
   <p>
-    <a href="https://changkun.de">欧长坤</a>版权所有 &copy; 2016-<%- new Date().getFullYear() %>，
+    <a href="https://changkun.de">欧长坤</a> &copy; 2016-<%- new Date().getFullYear() %> 版权所有，
     采用<a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/">知识共享署名-非商业性使用-禁止演绎 4.0 国际许可协议许可</a>，代码使用 <a href="https://opensource.org/licenses/MIT" target="_blank">MIT</a> 协议开源。</a>
   </p>
 </div>
diff --git a/website/themes/moderncpp/layout/page.ejs b/website/themes/moderncpp/layout/page.ejs
index 7a6451c..04bc262 100755
--- a/website/themes/moderncpp/layout/page.ejs
+++ b/website/themes/moderncpp/layout/page.ejs
@@ -19,7 +19,7 @@
   </div>
   <div class="footer">
     <p>
-      <a href="https://changkun.de">欧长坤</a>版权所有 &copy; 2016-<%- new Date().getFullYear() %>，
+      <a href="https://changkun.de">欧长坤</a> &copy; 2016-<%- new Date().getFullYear() %> 版权所有，
       采用<a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/">知识共享署名-非商业性使用-禁止演绎 4.0 国际许可协议许可</a>，代码使用 <a href="https://opensource.org/licenses/MIT" target="_blank">MIT</a> 协议开源。</a>
     </p>
   </div>
diff --git a/website/themes/moderncpp/layout/partials/main_menu.ejs b/website/themes/moderncpp/layout/partials/main_menu.ejs
index af19fed..a6b2f5a 100755
--- a/website/themes/moderncpp/layout/partials/main_menu.ejs
+++ b/website/themes/moderncpp/layout/partials/main_menu.ejs
@@ -20,6 +20,10 @@
   </ul>
 </li>
 
+<li class="nav-dropdown-container about">
+  <a class="nav-link" href="https://github.com/changkun/modern-cpp-tutorial">GitHub</a>
+</li>
+
 <li class="nav-dropdown-container language">
   <a class="nav-link">
     <span style="content: url(/modern-cpp/images/lang/cn.svg); width: 15px; height: 15px; margin-right: 5px; vertical-align: middle; margin-bottom: 2px;"></span>