diff --git a/Gemfile.lock b/Gemfile.lock
index 6abd82dd..fb5da8a9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -103,7 +103,7 @@ GEM
       xpath (~> 3.2)
     cgi (0.5.1)
     coderay (1.1.3)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     coveralls (0.8.23)
       json (>= 1.8, < 3)