diff --git a/Gemfile.lock b/Gemfile.lock
index 1794039..a60ef65 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -151,7 +151,7 @@ GEM
     minitest (5.25.1)
     mocha (2.5.0)
       ruby2_keywords (>= 0.0.5)
-    msgpack (1.7.3)
+    msgpack (1.7.4)
     net-http (0.5.0)
       uri
     net-imap (0.5.0)