diff --git a/theme-switcher.service b/theme-switcher.service
index 5ab9ff9..17d4c9c 100644
--- a/theme-switcher.service
+++ b/theme-switcher.service
@@ -5,6 +5,7 @@ Description=Switch the Plasma theme
 After=plasma-workspace.target
 
 [Service]
+Environment=DISPLAY=:0
 ExecStart=/usr/bin/bash /home/username/.theme-switcher/theme-switcher.sh
 
 [Install]