diff --git a/podman-peerjs/50_update.sh b/podman-peerjs/50_update.sh
index c708b0d..af2e436 100755
--- a/podman-peerjs/50_update.sh
+++ b/podman-peerjs/50_update.sh
@@ -7,5 +7,18 @@ source ${ABSDIR}/vars.sh
 ensure_pwd_is_scriptdir
 ensure_not_root
 
-echo NOT IMPLEMENTED YET
-exit 1
+
+upstream_image='docker.io/peerjs/peerjs-server'
+upstream_version='0.6.1'
+upstream_imageversion=${upstream_image}:${container_name}
+current_imageversion=$(podman container inspect -f '{{.ImageName}}' ${container_name})
+
+if [[ "${upstream_imageversion}" != "${current_imageversion}" ]] ; then
+    echo Container ${container_name} needs to be rebuilt
+    echo NOT IMPLEMENTED YET
+    exit 1
+else
+    echo Container ${container_name} does not needs rebuilding. Exiting
+    exit 0
+fi
+