diff --git a/Gemfile.lock b/Gemfile.lock
index b2e0ac99..dbc31849 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -135,7 +135,7 @@ GEM
     minitest (5.20.0)
     msgpack (1.7.2)
     mutex_m (0.1.2)
-    net-imap (0.4.1)
+    net-imap (0.4.2)
       date
       net-protocol
     net-pop (0.1.2)