diff --git a/Gemfile.lock b/Gemfile.lock
index da75225a..b40d07db 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -327,7 +327,7 @@ GEM
     mysql2 (0.5.6)
     net-http-persistent (4.0.5)
       connection_pool (~> 2.2)
-    net-imap (0.5.3)
+    net-imap (0.5.6)
       date
       net-protocol
     net-pop (0.1.2)