diff --git a/Gemfile.lock b/Gemfile.lock
index 74e6c1d0..feb68562 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -301,8 +301,11 @@ GEM
     loofah (2.20.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.7.1)
+    mail (2.8.1)
       mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
     marcel (1.0.2)
     matrix (0.4.2)
     method_source (1.0.0)