diff --git a/Gemfile.lock b/Gemfile.lock
index 031f4c894..f3c8ad090 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
     naught (1.1.0)
     net-protocol (0.1.3)
       timeout
-    net-smtp (0.3.2)
+    net-smtp (0.3.3)
       net-protocol
     netrc (0.11.0)
     nio4r (2.5.8)