diff --git a/caddy.service b/caddy.service
index b81f8bb..9e09f91 100644
--- a/caddy.service
+++ b/caddy.service
@@ -15,7 +15,7 @@ Group=caddy
 Environment=CADDYPATH=/etc/ssl/caddy
 
 ; Always set "-root" to something safe in case it gets forgotten in the Caddyfile.
-ExecStart=/usr/local/bin/caddy -log stdout -agree=true -conf=/etc/caddy/Caddyfile -root=/var/tmp
+ExecStart=/usr/local/bin/caddy -log stdout -agree=true -conf=/etc/caddy/Caddyfile -root=/var/tmp -envfile /etc/caddy/env
 ExecReload=/bin/kill -USR1 $MAINPID
 
 ; Use graceful shutdown with a reasonable timeout