diff --git a/Gemfile.lock b/Gemfile.lock
index cb211fd..4f4c1e1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -190,7 +190,7 @@ GEM
     multipart-post (2.4.1)
     net-http (0.5.0)
       uri
-    net-imap (0.5.0)
+    net-imap (0.5.1)
       date
       net-protocol
     net-pop (0.1.2)