diff --git a/Gemfile.lock b/Gemfile.lock
index ef3c724..fae3567 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,7 +27,7 @@ GEM
     coderay (1.1.3)
     colored (1.2)
     commonmarker (0.23.10)
-    concurrent-ruby (1.3.4)
+    concurrent-ruby (1.3.7)
     connection_pool (2.4.0)
     cri (2.15.12)
     ddmetrics (1.1.0)