diff --git a/Gemfile.lock b/Gemfile.lock
index 1299828d..fcd09b8b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,7 +61,7 @@ GEM
     builder (3.3.0)
     byebug (11.1.3)
     cgi (0.5.1)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     constant_resolver (0.3.0)
     crass (1.0.6)