diff --git a/Gemfile.lock b/Gemfile.lock
index 2007fff..5808db8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -39,7 +39,7 @@ GEM
     builder (3.3.0)
     cgi (0.5.1)
     coderay (1.1.3)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     crass (1.0.6)
     docile (1.4.0)