diff --git a/Gemfile.lock b/Gemfile.lock
index 5ca85fd..fb5c637 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -155,7 +155,7 @@ GEM
       ruby2_keywords (>= 0.0.5)
     msgpack (1.7.2)
     mutex_m (0.2.0)
-    net-imap (0.4.8)
+    net-imap (0.4.9)
       date
       net-protocol
     net-pop (0.1.2)