diff --git a/compose.yaml b/compose.yaml
index 3bd884e..fce2c3e 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -6,7 +6,7 @@ services:
     ports:
       - ${COMPOSE_PORT_HTTP:-3000}:3000
     environment:
-      DATABASE_URL=${DATABASE_URL}
+      DATABASE_URL: ${DATABASE_URL}
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
       - /opt/docker:/docker