diff --git a/1.4-Troubleshooting.md b/1.4-Troubleshooting.md
index d7b2228..68144b8 100644
--- a/1.4-Troubleshooting.md
+++ b/1.4-Troubleshooting.md
@@ -1,7 +1,7 @@
 ## How to troubleshoot a preference
 
 1. Download and unpack a portable Firefox
-   * Current stable Firefox portable is always [here](http://portableapps.com/apps/internet/firefox_portable)
+   * Current stable Firefox portable is always [here](https://portableapps.com/apps/internet/firefox_portable)
    * Older versions are [here](https://sourceforge.net/projects/portableapps/files/Mozilla%20Firefox%2C%20Portable%20Ed./)
 2. Create a profile and test the problem
    * Open Firefox and go to the web page where you can replicate the problem and bookmark it