diff --git a/.travis.yml b/.travis.yml
index cfbb789..c3a92c2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,7 +25,7 @@ script:
 before_deploy:
  - git config --local user.name "bebbo@travis-ci"
  - git config --local user.email "bebbo@bejy.net"
- - export TRAVIS_TAG=latest-$(date)
+ - export TRAVIS_TAG=latest-$(date +'%Y%m%d%H%M%S')
  - git tag $TRAVIS_TAG
 deploy:
   provider: releases