diff --git a/.travis.yml b/.travis.yml
index fda6392..9144671 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,6 +22,7 @@ addons:
 env:
   global:
   - VERSION="9.0" TESTS="0" LINT_CHECK="0" TRANSIFEX="0"
+  - WKHTMLTOPDF_VERSION="0.12.4"
   - TRANSIFEX_USER='transbot@odoo-community.org'
   - secure: HwYn7vV4wIM4ocObmgkylZmaw6FQynkbMiJmoTTfgL3y3Gy6IAPVXgTNXFUiIuYXZZ4B2GOAfcECQejCCw2KP7OCcBo1oGNuSJ2aVwiQcRH1ENDLTsMq1jcB/4vQuAmTS8WEE5nRkPyutwgE4kBYvZC4tENatakafPRAS+iNqpQ=