diff --git a/Gemfile.lock b/Gemfile.lock
index ffaffd7..df191b1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -242,7 +242,7 @@ GEM
     msgpack (1.7.5)
     multipart-post (2.4.1)
     mutex_m (0.3.0)
-    net-imap (0.5.5)
+    net-imap (0.5.6)
       date
       net-protocol
     net-pop (0.1.2)