diff --git a/README.md b/README.md
index 8d26e5d..a9e2edd 100644
--- a/README.md
+++ b/README.md
@@ -118,7 +118,7 @@ sudo apt update
 ###### 16.04 LTS
 
 ```bash
-wget -q https://download.opensuse.org/repositories/home:/Ximi1970:/Mozilla:/Add-ons/xUbuntu_16.04/Release.key
+wget -q http://download.opensuse.org/repositories/home:/Ximi1970:/Mozilla:/Add-ons/xUbuntu_16.04/Release.key
 sudo apt-key add Release.key
 sudo bash -c 'echo "deb https://download.opensuse.org/repositories/home:/Ximi1970:/Mozilla:/Add-ons/xUbuntu_16.04 ./" > /etc/apt/sources.list.d/systray-x.list'
 sudo apt update