diff --git a/docker-compose.yml b/docker-compose.yml
index 1679b82..d550545 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,10 +3,10 @@ services:
         container_name: drone-runner
         image: drone/drone-runner-docker:1
         environment:
-          - DRONE_RPC_PROTO={{RPC_PROTO}}
-          - DRONE_RPC_HOST={{RPC_HOST}}
-          - DRONE_RPC_SECRET={{RPC_SECRET}}
-          - DRONE_RUNNER_CAPACITY={{RUNNER_CAPACITY}}
+          - DRONE_RPC_PROTO=${RPC_PROTO}
+          - DRONE_RPC_HOST=${RPC_HOST}
+          - DRONE_RPC_SECRET=${RPC_SECRET}
+          - DRONE_RUNNER_CAPACITY=${RUNNER_CAPACITY}
           - DRONE_RUNNER_NAME=${HOSTNAME}
         volumes:
           - /var/run/docker.sock:/var/run/docker.sock