diff --git a/docker/server-env/docker-compose.yml b/docker/server-env/docker-compose.yml
index 7a8d7c6b..79d9896f 100644
--- a/docker/server-env/docker-compose.yml
+++ b/docker/server-env/docker-compose.yml
@@ -12,7 +12,7 @@
 
 version: "1.0"
 volumes:
-  - outputdata:
+  outputdata:
 services:
   server:
     image: "project-faster/qpep-server"