diff --git a/Gemfile.lock b/Gemfile.lock
index 0bd76b9d206..a534b17b158 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -248,7 +248,7 @@ GEM
     mustache (1.1.1)
     net-http (0.3.2)
       uri
-    net-imap (0.3.7)
+    net-imap (0.4.0)
       date
       net-protocol
     net-pop (0.1.2)