diff --git a/Gemfile.lock b/Gemfile.lock
index d7df28eba8..52c8d770e1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     ast (2.4.2)
     benchmark (0.4.0)
     coderay (1.1.3)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.7)
     docile (1.4.0)
     i18n (1.14.7)
       concurrent-ruby (~> 1.0)