diff --git a/TogglLibrary.js b/TogglLibrary.js
index 497aacade1bb0bac6ab47625d4cba252b8880c7a..09301de72165f9c83748dc9ad3e75de18d207c03 100644
--- a/TogglLibrary.js
+++ b/TogglLibrary.js
@@ -233,9 +233,9 @@ function TogglButtonGM(selector, renderer) {
     }); 
   }
   
-  
+  const togglTimerUrl = /https:\/\/(?:www\.)toggl\.com\/app\/timer/;
   this.tryDecorateTimer = () => {
-    if (!window.location.href.startsWith("https://toggl.com/app/timer"))
+    if (!togglTimerUrl.test(window.location.href))
       return;
     GM_addStyle("li.entry div.paragon-decoration { width:3em; padding:16px; }");
     waitForElement(document, "#time-entry-list").then(timeEntryList => {