diff --git a/Gemfile.lock b/Gemfile.lock
index 9c399339bb..b74ca9c565 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -342,7 +342,7 @@ GEM
     nenv (0.3.0)
     net-http (0.6.0)
       uri
-    net-imap (0.4.19)
+    net-imap (0.4.20)
       date
       net-protocol
     net-pop (0.1.2)