diff --git a/Gemfile.lock b/Gemfile.lock
index 5e1906e..0d5a6eb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,7 +15,7 @@ GEM
     awesome_print (1.9.2)
     base64 (0.3.0)
     bigdecimal (3.2.2)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.7)
     crack (1.0.0)
       bigdecimal
       rexml