diff --git a/gemfiles/typecheck/Gemfile.lock b/gemfiles/typecheck/Gemfile.lock
index be2b3c701a..a5e71c2af8 100644
--- a/gemfiles/typecheck/Gemfile.lock
+++ b/gemfiles/typecheck/Gemfile.lock
@@ -18,7 +18,7 @@ GEM
     base64 (0.3.0)
     benchmark (0.5.0)
     bigdecimal (3.3.1)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.7)
     connection_pool (2.5.4)
     csv (3.3.5)
     drb (2.2.3)