diff --git a/Gemfile.lock b/Gemfile.lock
index b98b9e378..9b43e008d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -170,7 +170,7 @@ GEM
     matrix (0.4.3)
     method_source (1.1.0)
     mini_mime (1.1.5)
-    minitest (5.25.5)
+    minitest (5.26.0)
     net-imap (0.5.9)
       date
       net-protocol