diff --git a/Gemfile.lock b/Gemfile.lock
index c8d7c6e..5c5b56d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -25,7 +25,7 @@ GEM
     coffee-script-source (1.11.1)
     colorator (1.1.0)
     commonmarker (0.23.12)
-    concurrent-ruby (1.2.2)
+    concurrent-ruby (1.3.7)
     connection_pool (2.5.5)
     dnsruby (1.73.1)
       base64 (>= 0.2)