diff --git a/_config.yml.example b/_config.yml.example
index add9135..543ab45 100644
--- a/_config.yml.example
+++ b/_config.yml.example
@@ -66,6 +66,7 @@ plugins:
     google_analytics: # enter the tracking ID for your Google Analytics
     google_site_verification: # enter Google site verification code
     baidu_analytics: # enter Baidu Analytics hash key
+    mathjax: false # options: true, false
 
 # Miscellaneous
 miscellaneous:
diff --git a/layout/plugin/scripts.ejs b/layout/plugin/scripts.ejs
index 065702c..332eca1 100644
--- a/layout/plugin/scripts.ejs
+++ b/layout/plugin/scripts.ejs
@@ -29,4 +29,10 @@
     <% if (theme.plugins.justifiedgallery) { %>
         <%- js('libs/justified-gallery/jquery.justifiedGallery.min') %>
     <% } %>
+    <% if (theme.plugins.mathjax) { %>
+        <script type="text/x-mathjax-config">
+            MathJax.Hub.Config({ tex2jax: { inlineMath: [['$','$'], ['\\(','\\)']] } });
+        </script>
+        <%- js('https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-MML-AM_CHTML') %>
+    <% } %>
 <% } %>
diff --git a/source/css/style.styl b/source/css/style.styl
index 2c5810d..e8933aa 100644
--- a/source/css/style.styl
+++ b/source/css/style.styl
@@ -31,7 +31,7 @@ code
     margin: 0 2px
     color: #e96900
     padding: 3px 5px
-    font-size: 0.8em
+    font-size: 0.9em
     border-radius: 2px
     font-family: font-mono
     background-color: #f8f8f8