diff --git a/docker-compose.yml b/docker-compose.yml
index c3ee2ef..7b27ed1 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -85,7 +85,7 @@ services:
     environment:
       - VPN_SERVICE_PROVIDER=protonvpn
       - VPN_TYPE=wireguard
-      - WIREGUARD_PRIVATE_KEY={WIREGUARD_PRIVATE_KEY}
+      - WIREGUARD_PRIVATE_KEY=${WIREGUARD_PRIVATE_KEY}
       - SERVER_COUNTRIES=Estonia
       - PORT_FORWARD_ONLY=on
       - VPN_PORT_FORWARDING=on