diff --git a/Gemfile.lock b/Gemfile.lock
index 24f501e..e94cccd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,7 +29,7 @@ GEM
       rake
       thor (>= 0.14.0)
     builder (3.2.3)
-    concurrent-ruby (1.1.4)
+    concurrent-ruby (1.1.5)
     crass (1.0.4)
     diff-lcs (1.3)
     erubi (1.8.0)