diff --git a/swarm/gitrunner.yaml b/swarm/gitrunner.yaml
index 5717b87..19d4605 100644
--- a/swarm/gitrunner.yaml
+++ b/swarm/gitrunner.yaml
@@ -1,3 +1,5 @@
+version: "3.9"
+
 services:
   forgejo-runner:
     image: data.forgejo.org/forgejo/runner:4.0.0
@@ -25,4 +27,3 @@ services:
 networks:
   netgrimoire:
     external: true
-