diff --git a/.travis.yml b/.travis.yml
index 83276ee..3c3779e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,10 @@ services: docker
 
 language: bash
 
+branches:
+  only:
+    - master
+
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images