diff --git a/Gemfile.lock b/Gemfile.lock
index e81f273..378db3f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
       xpath (~> 3.2)
     childprocess (5.1.0)
       logger (~> 1.5)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     crass (1.0.6)
     cssbundling-rails (1.4.3)