diff --git a/src/assets/css/theme1.css b/src/assets/css/theme_github.css
similarity index 100%
rename from src/assets/css/theme1.css
rename to src/assets/css/theme_github.css
diff --git a/src/option/read.jsx b/src/option/read.jsx
index 9b3071d1..eb02728a 100644
--- a/src/option/read.jsx
+++ b/src/option/read.jsx
@@ -21,10 +21,10 @@ export default class ReadOpt extends React.Component {
         if ( event.target.tagName.toLowerCase() == "sr-opt-theme" ) {
 
             // add test code
-            if ( this.props.option.theme == "theme1" ) {
+            if ( this.props.option.theme == "github" ) {
                 this.props.option.theme = "theme2";
             } else {
-                this.props.option.theme = "theme1";
+                this.props.option.theme = "github";
             }
             console.log( "this.props.option.theme = ", this.props.option.theme )
 
diff --git a/src/read/read.jsx b/src/read/read.jsx
index 60b1419e..742a0daa 100644
--- a/src/read/read.jsx
+++ b/src/read/read.jsx
@@ -52,8 +52,8 @@ class Read extends React.Component {
     constructor( props ) {
         super( props );
         switch ( this.props.read.theme ) {
-            case "theme1":
-               require( "theme1" );
+            case "github":
+               require( "github" );
                break;
             case "theme2":
                require( "theme2" );
diff --git a/src/service/storage.js b/src/service/storage.js
index e3266c03..264969a5 100644
--- a/src/service/storage.js
+++ b/src/service/storage.js
@@ -35,7 +35,7 @@ const name = "simpread",
     read   = {
         version   : "2017-01-07",
         shortcuts : "A A",
-        theme     : "theme1",
+        theme     : "github",
         fontfamily: "",
         fontsize  : 14,
         sites     : []    // e.g. [ "<url>", site ]
diff --git a/webpack.config.js b/webpack.config.js
index 8aa35769..10664375 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -163,7 +163,7 @@ const webpack = require( 'webpack' ),
           focusopt   : __dirname + '/src/option/focus.jsx',
           readopt    : __dirname + '/src/option/read.jsx',
 
-          theme1     : '../assets/css/theme1.css',
+          github     : '../assets/css/theme_github.css',
           theme2     : '../assets/css/theme2.css',
 
         }