diff --git a/Gemfile.lock b/Gemfile.lock
index e6a9f477..71b504d2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -314,7 +314,7 @@ GEM
     multipart-post (2.4.1)
     net-http (0.6.0)
       uri
-    net-imap (0.5.6)
+    net-imap (0.5.9)
       date
       net-protocol
     net-pop (0.1.2)