diff --git a/README.md b/README.md
index c2ca3d8..0eb5806 100644
--- a/README.md
+++ b/README.md
@@ -390,10 +390,16 @@ Requirements:
     ```bash
     sudo yum install epel-release
     sudo yum install kf5-knotifications-devel
-    sudo yun install qt5-qtbase-devel gnome-shell-extension-appindicator
+    sudo yum install qt5-qtbase-devel
+    ```
+    If you want to use systray-x under Gnome you also need to add the systray repository for your CentOS version (replace the XX with your version):
+    ```bash
+    sudo yum-config-manager --add-repo=https://download.opensuse.org/repositories/home:/Ximi1970:/Mozilla:/Add-ons/CentOS_XX/home:Ximi1970:Mozilla:Add-ons.repo
+    sudo yum install gnome-shell-extension-appindicator
     gnome-extensions enable appindicatorsupport@rgcjonas.gmail.com
     ```
     
+    
   - Ubuntu:
 
       20.04 LTS