diff --git a/Gemfile.lock b/Gemfile.lock
index a9925d7..5bd267d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -150,7 +150,7 @@ GEM
     mini_mime (1.1.5)
     minitest (5.25.4)
     msgpack (1.7.5)
-    net-imap (0.5.5)
+    net-imap (0.5.6)
       date
       net-protocol
     net-pop (0.1.2)