diff --git a/Gemfile.lock b/Gemfile.lock
index 3c4bf110..f097530c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -323,7 +323,10 @@ GEM
       timeout
     net-protocol (0.1.3)
       timeout
-    net-smtp (0.1.0)
+    net-smtp (0.3.1)
+      digest
+      net-protocol
+      timeout
     nio4r (2.5.8)
     nokogiri (1.13.7)
       mini_portile2 (~> 2.8.0)