diff --git a/builder/Gemfile.lock b/builder/Gemfile.lock
index c81c1a65810..f5bfc86a41a 100644
--- a/builder/Gemfile.lock
+++ b/builder/Gemfile.lock
@@ -149,7 +149,7 @@ GEM
     minitest (5.25.4)
     msgpack (1.8.0)
     mutex_m (0.3.0)
-    net-imap (0.5.5)
+    net-imap (0.5.6)
       date
       net-protocol
     net-pop (0.1.2)