diff --git a/Gemfile.lock b/Gemfile.lock
index 7b3d5ba..75a0e0c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -133,7 +133,7 @@ GEM
       prism (~> 1.5)
     multi_xml (0.8.1)
       bigdecimal (>= 3.1, < 5)
-    net-imap (0.6.3)
+    net-imap (0.6.4)
       date
       net-protocol
     net-pop (0.1.2)