diff --git a/package.json b/package.json
index 0a4e3af..74d7e11 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "eruda",
-  "version": "0.0.3",
+  "version": "0.0.4",
   "description": "Console for mobile JavaScript",
   "main": "index.js",
   "scripts": {
diff --git a/src/Elements/CssStore.es6 b/src/Elements/CssStore.es6
index 5cd21f7..ca3e4e6 100644
--- a/src/Elements/CssStore.es6
+++ b/src/Elements/CssStore.es6
@@ -46,6 +46,8 @@ export default class CssStore
 
         util.each(document.styleSheets, (styleSheet) =>
         {
+            if (!styleSheet.cssRules) return;
+
             util.each(styleSheet.cssRules, (cssRule) =>
             {
                 var matchesEl = false;