diff --git a/Gemfile.lock b/Gemfile.lock
index 9c0554c4..0a89d6f4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -31,7 +31,7 @@ GEM
     bigdecimal (3.2.3)
     cgi (0.5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.7)
     csv (3.3.5)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)