diff --git a/circle.yml b/circle.yml
index 7a97d756c5..65db7c29ad 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,3 +1,7 @@
+machine:
+  node:
+    version: 6.1.0
+
 test:
   override:
     - npm run test:coverage