diff --git a/Gemfile.lock b/Gemfile.lock
index bdb55fb..c7fcb24 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -149,7 +149,7 @@ GEM
       net-imap
       net-pop
       net-smtp
-    marcel (1.1.1)
+    marcel (1.2.1)
     mini_mime (1.1.5)
     minitest (6.0.6)
       drb (~> 2.0)