diff --git a/Dockerfile b/Dockerfile
index f8f2ad3..ff1dcb8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,7 @@
 FROM gitea/act_runner:nightly-dind-rootless
 
+ARG VERSION=nightly-20240918
+
 USER root
 
 # Create a symlink, as the runner expects the socket to be in `/var/run/docker.sock`.