diff --git a/compose-ci.yml b/compose-ci.yml
index 3c41f200..3920500f 100644
--- a/compose-ci.yml
+++ b/compose-ci.yml
@@ -1,4 +1,4 @@
-version: '3.5'
+version: '2.0'
 services:
   # PostgreSQL database
   db: