diff --git a/.travis.yml b/.travis.yml
index 118bf7d..448718f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ deploy:
     on:
       branch: master
       tags: true
-      condition: "$TRAVIS_TAG =~ ^[0-9]+(\.[0-9]+)*$"
+      condition: '$TRAVIS_TAG =~ ^[0-9]+(\.[0-9]+)*$'
   - provider: script
     script: make test_master
     on: