diff --git a/Gemfile.lock b/Gemfile.lock
index 27c1a16e..5846819e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -228,7 +228,7 @@ GEM
     multi_json (1.15.0)
     net-http (0.4.1)
       uri
-    net-imap (0.4.16)
+    net-imap (0.5.0)
       date
       net-protocol
     net-pop (0.1.2)