diff --git a/Gemfile.lock b/Gemfile.lock
index 4717e4158..a21576ef0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -280,7 +280,7 @@ GEM
     minitest (5.20.0)
     mocha (2.1.0)
       ruby2_keywords (>= 0.0.5)
-    msgpack (1.6.0)
+    msgpack (1.7.2)
     multi_json (1.15.0)
     mysql2 (0.5.5)
     net-imap (0.3.7)