diff --git a/circle.yml b/circle.yml
index aa3890e..8944130 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,3 +1,7 @@
+general:
+    branches:
+        only:
+            - master
 dependencies:
     override:
         - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y