diff --git a/Gemfile.lock b/Gemfile.lock
index b0769eb2..1410a5a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -273,7 +273,7 @@ GEM
     msgpack (1.8.0)
     multi_json (1.15.0)
     multipart-post (2.4.1)
-    net-imap (0.5.6)
+    net-imap (0.5.7)
       date
       net-protocol
     net-pop (0.1.2)