diff --git a/Gemfile.lock b/Gemfile.lock
index b0daad46..30d62121 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -157,7 +157,7 @@ GEM
     msgpack (1.7.2)
     multi_xml (0.6.0)
     mutex_m (0.2.0)
-    net-imap (0.4.9)
+    net-imap (0.4.9.1)
       date
       net-protocol
     net-pop (0.1.2)