diff --git a/Gemfile.lock b/Gemfile.lock
index 5f99125..4796851 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -94,7 +94,7 @@ GEM
     method_source (1.1.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.9)
-    minitest (5.25.5)
+    minitest (5.27.0)
     net-imap (0.5.9)
       date
       net-protocol