diff --git a/Gemfile.lock b/Gemfile.lock
index 44738a27..4579a82a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -248,7 +248,7 @@ GEM
     mutex_m (0.3.0)
     net-http (0.6.0)
       uri
-    net-imap (0.5.6)
+    net-imap (0.5.8)
       date
       net-protocol
     net-pop (0.1.2)