diff --git a/gemfiles/typecheck/Gemfile.lock b/gemfiles/typecheck/Gemfile.lock
index cc530d079a6..4a3655c27d0 100644
--- a/gemfiles/typecheck/Gemfile.lock
+++ b/gemfiles/typecheck/Gemfile.lock
@@ -132,4 +132,4 @@ DEPENDENCIES
   test-unit
 
 BUNDLED WITH
-   2.5.3
+   2.5.9