diff --git a/4.2.1-User-Scripts.md b/4.2.1-User-Scripts.md
index ef275b8..959acfd 100644
--- a/4.2.1-User-Scripts.md
+++ b/4.2.1-User-Scripts.md
@@ -9,7 +9,7 @@ If you would like to submit any scripts to be added to this list, please post a
 ### :small_orange_diamond: Conceal history.length
  * Author: [Thorin-Oakenpants](https://github.com/Thorin-Oakenpants)
  * Description: This does not break history in any way. It just lies to any JS asking about it. Your actual (max) history is controlled by `browser.sessionhistory.max_entries` which is a per tab setting.
- * Test: [BrowserSpy.dk](http://browserspy.dk/document.php)
+ * Test: [BrowserSpy.dk](https://browserspy.dk/document.php)
  * :exclamation: **This userscript is easily detectable !**
    * [CanvasBlocker](https://addons.mozilla.org/en-US/firefox/addon/canvasblocker/) (v0.5.3-RC1 and newer) supports `history.length` spoofing without leaking the custom function. (see "History API")