diff --git a/Gemfile.lock b/Gemfile.lock
index 8208edb..c64097e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -91,7 +91,7 @@ GEM
     media_types (2.3.2)
     method_source (1.1.0)
     mini_mime (1.1.5)
-    minitest (5.25.1)
+    minitest (5.25.4)
     net-imap (0.4.14)
       date
       net-protocol