diff --git a/jupyterhub-rstudio-gitlab/docker-compose.yml b/jupyterhub-rstudio-gitlab/docker-compose.yml
index 1b06812cade90971701f18ac2d8c2068c3d2683b..80dfc3e75cdb93f3b905d69142f4419f5e4b50d7 100644
--- a/jupyterhub-rstudio-gitlab/docker-compose.yml
+++ b/jupyterhub-rstudio-gitlab/docker-compose.yml
@@ -1,4 +1,4 @@
-version: '3'
+version: '3.5'
 
 services:
   # Configuration for Hub+Proxy