diff --git a/Gemfile.lock b/Gemfile.lock
index 7a00c129d7..48e26d4596 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -396,7 +396,7 @@ GEM
       net-protocol
     net-protocol (0.2.2)
       timeout
-    net-smtp (0.5.0)
+    net-smtp (0.5.1)
       net-protocol
     netrc (0.11.0)
     nio4r (2.7.4)