diff --git a/deploy/playbooks/deploy.yml b/deploy/playbooks/deploy.yml
index 6ebc57f..ecdcdf3 100644
--- a/deploy/playbooks/deploy.yml
+++ b/deploy/playbooks/deploy.yml
@@ -17,7 +17,7 @@
       when: not skip_build
 
     - name: Generate a version name from the current timestamp
-      command: date '+%Y-%m-%dT%H:%M:%S'
+      command: date '+%Y-%m-%d-%s'
       register: new_app_version
 
     - name: Print out the new version name