diff --git a/Gemfile.lock b/Gemfile.lock
index aa76f69..dfa4b58 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -115,7 +115,7 @@ GEM
       net-protocol
     net-protocol (0.2.2)
       timeout
-    net-smtp (0.4.0.1)
+    net-smtp (0.5.0)
       net-protocol
     nio4r (2.7.0)
     nokogiri (1.16.2)