diff --git a/Gemfile.lock b/Gemfile.lock
index 31abe3f..075158f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -246,7 +246,8 @@ GEM
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    minitest (6.0.1)
+    minitest (6.0.2)
+      drb (~> 2.0)
       prism (~> 1.5)
     net-http (0.9.1)
       uri (>= 0.11.1)