diff --git a/Gemfile.lock b/Gemfile.lock
index b3dc6e7..075a070 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,7 +38,7 @@ GEM
       tzinfo (~> 1.1)
     addressable (2.4.0)
     arel (6.0.3)
-    ast (2.2.0)
+    ast (2.3.0)
     buftok (0.2.0)
     builder (3.2.2)
     concurrent-ruby (1.0.2)