diff --git a/Gemfile.lock b/Gemfile.lock
index b7f133d2..126aac0b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -326,7 +326,7 @@ GEM
       net-protocol
     net-protocol (0.2.2)
       timeout
-    net-smtp (0.5.0)
+    net-smtp (0.4.0)
       net-protocol
     nio4r (2.7.1)
     nokogiri (1.16.4)