diff --git a/Gemfile.lock b/Gemfile.lock
index 03aa35be4..6c72e3470 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -279,7 +279,7 @@ GEM
     nested_form (0.3.2)
     net-http (0.4.1)
       uri
-    net-imap (0.5.6)
+    net-imap (0.5.7)
       date
       net-protocol
     net-pop (0.1.2)