diff --git a/.travis.yml b/.travis.yml
index 8d46111..01803e1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,7 @@
 language: go
+branches:
+  only:
+    - master
 before_script:
   - go get -u golang.org/x/tools/cmd/goyacc
   - go get -u github.com/kylelemons/godebug/pretty