diff --git a/Gemfile.lock b/Gemfile.lock
index 9d3192f..2288bf8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -186,7 +186,7 @@ GEM
     minitest (6.0.6)
       drb (~> 2.0)
       prism (~> 1.5)
-    msgpack (1.7.2)
+    msgpack (1.8.2)
     net-imap (0.6.4.1)
       date
       net-protocol