diff --git a/Gemfile.lock b/Gemfile.lock
index 2c2caeadc..d26e70d59 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,7 +101,7 @@ GEM
     mutex_m (0.2.0)
     net-protocol (0.2.2)
       timeout
-    net-smtp (0.4.0)
+    net-smtp (0.4.0.1)
       net-protocol
     netrc (0.11.0)
     nio4r (2.7.0)