diff --git a/README.md b/README.md
index f3951b6..d07a7ca 100644
--- a/README.md
+++ b/README.md
@@ -28,11 +28,11 @@ workspaces:
 Next, you simply need to run `i3-wallpaper-manager` while specify the path to the configuration file.
 
 ```
-i3-wallpaper-manager /path/to/config.yaml
+DISPLAY=:0 i3-wallpaper-manager /path/to/config.yaml
 ```
 
 To run it when i3 starts, add this to your i3 configuration:
 
 ```
-exec_always i3-wallpaper-manager /path/to/config.yaml
+exec_always DISPLAY=:0 i3-wallpaper-manager /path/to/config.yaml
 ```