diff --git a/Gemfile.lock b/Gemfile.lock
index 54f3be0..23d504b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -124,7 +124,7 @@ GEM
     semver2 (3.4.2)
     sorbet-runtime (0.5.11670)
     stringio (3.1.2)
-    test-unit (3.6.4)
+    test-unit (3.6.7)
       power_assert
     thor (1.3.2)
     thread_safe (0.3.6)