diff --git a/Gemfile.lock b/Gemfile.lock
index 5e2e8d20..0b11e827 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -203,7 +203,7 @@ GEM
       timeout
     net-scp (4.0.0)
       net-ssh (>= 2.6.5, < 8.0.0)
-    net-smtp (0.3.3)
+    net-smtp (0.4.0)
       net-protocol
     net-ssh (7.2.0)
     nio4r (2.5.9)