diff --git a/Gemfile.lock b/Gemfile.lock
index a27b615..7ab9129 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -159,7 +159,7 @@ GEM
     mini_mime (1.1.5)
     minitest (5.25.5)
     msgpack (1.8.0)
-    net-imap (0.5.6)
+    net-imap (0.5.7)
       date
       net-protocol
     net-pop (0.1.2)