diff --git a/Gemfile.lock b/Gemfile.lock
index e56e0f7f..0d7b7624 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -309,7 +309,7 @@ GEM
     minitest (6.0.6)
       drb (~> 2.0)
       prism (~> 1.5)
-    msgpack (1.8.0)
+    msgpack (1.8.4)
     multi_json (1.19.1)
     net-http (0.9.1)
       uri (>= 0.11.1)