diff --git a/README.md b/README.md
index 349b4d3bc0089563ac469032331727e8f08a5ae7..6ca730f374e56af878ac1664f57d8cc16fc6befc 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ According to the version of Firefox, the addition of a new header behaves differ
 In order to work, the following browser permissions are needed for the extension: 
 - storage : needed to store the configuration and the rules
 - activeTab, tabs : needed to show the configuration screen in the browser tab.
-- webRequest,webRequestBlocking,<all_urls> :  needed to modify the urls according to the rules table. 
+- webRequest,webRequestBlocking,<all_urls> :  needed to modify the headers according to the rules table. 
   
 ## License
 The code is opensource under Mozilla Public License 2.0