diff --git a/Gemfile.lock b/Gemfile.lock
index 80eb466..735bc17 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -39,7 +39,8 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     logger (1.7.0)
-    minitest (6.0.1)
+    minitest (6.0.2)
+      drb (~> 2.0)
       prism (~> 1.5)
     minitest-ci (3.4.0)
       minitest (>= 5.0.6)