diff --git a/circle.yml b/circle.yml
index 0a86d221d..861353cb3 100644
--- a/circle.yml
+++ b/circle.yml
@@ -4,6 +4,11 @@ machine:
   ruby:
     version: 2.1.2
 
+general:
+  branches:
+    only:
+      - master # ignore PRs and branches
+
 dependencies:
   pre:
     - ./scripts/docs/prepare.sh