diff --git a/docker-compose.yml b/docker-compose.yml
index 0994163b5..319755a38 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,4 +1,3 @@
-version: '2.1'
 services:
   qgis-testing-environment:
     image: ${IMAGE}:${QGIS_VERSION_TAG}