diff --git a/builder/Gemfile.lock b/builder/Gemfile.lock
index e119f5e5027..b3b2d29e504 100644
--- a/builder/Gemfile.lock
+++ b/builder/Gemfile.lock
@@ -144,7 +144,7 @@ GEM
     mini_mime (1.1.5)
     minitest (5.25.1)
     msgpack (1.7.3)
-    net-imap (0.4.17)
+    net-imap (0.5.0)
       date
       net-protocol
     net-pop (0.1.2)