diff --git a/Gemfile.lock b/Gemfile.lock
index 4609b0a1..5e3a383b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -153,7 +153,7 @@ GEM
       bigdecimal
     net-http (0.9.1)
       uri (>= 0.11.1)
-    net-imap (0.6.3)
+    net-imap (0.6.4)
       date
       net-protocol
     net-pop (0.1.2)