diff --git a/spec/tester_mongo_rails_6/Gemfile.lock b/spec/tester_mongo_rails_6/Gemfile.lock
index 5bc05e00..9aea179f 100644
--- a/spec/tester_mongo_rails_6/Gemfile.lock
+++ b/spec/tester_mongo_rails_6/Gemfile.lock
@@ -148,7 +148,7 @@ GEM
       activemodel (>= 5.1, < 8.1, != 7.0.0)
       concurrent-ruby (>= 1.0.5, < 2.0)
       mongo (>= 2.18.0, < 3.0.0)
-    msgpack (1.8.2)
+    msgpack (1.8.7)
     mutex_m (0.3.0)
     net-imap (0.6.6)
       date