diff --git a/Builder/Gemfile.lock b/Builder/Gemfile.lock
index a72895878b4..cf6d8f6342a 100644
--- a/Builder/Gemfile.lock
+++ b/Builder/Gemfile.lock
@@ -125,7 +125,7 @@ GEM
     mini_magick (4.12.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.4)
-    minitest (5.19.0)
+    minitest (5.20.0)
     msgpack (1.7.2)
     net-imap (0.3.7)
       date