diff --git a/README.md b/README.md
index bff689d..2708f73 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ module.exports = {
   module: {
     rules: [
       {
-        test: /\.(png|jpg|gif)$/,
+        test: /\.(png|jpg|gif)$/i,
         use: [
           {
             loader: 'url-loader',
@@ -163,4 +163,4 @@ Please take a moment to read our contributing guidelines if you haven't yet done
 [chat-url]: https://gitter.im/webpack/webpack
 
 [size]: https://packagephobia.now.sh/badge?p=url-loader
-[size-url]: https://packagephobia.now.sh/result?p=url-loader
\ No newline at end of file
+[size-url]: https://packagephobia.now.sh/result?p=url-loader