diff --git a/circle.yml b/circle.yml
index a8f1aa10..468d8c31 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,7 +1,7 @@
 ---
 machine:
   ruby:
-    version: '2.1'
+    version: '2.2'
 test:
   override:
     - bundle exec rake ci