diff --git a/Gemfile.lock b/Gemfile.lock
index 6b7883832..555e5463c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -256,7 +256,7 @@ GEM
     mutex_m (0.2.0)
     net-http (0.4.1)
       uri
-    net-imap (0.4.12)
+    net-imap (0.4.13)
       date
       net-protocol
     net-pop (0.1.2)