diff --git a/Gemfile b/Gemfile
index 1f0ea9a4..9f83c602 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,4 +11,4 @@ gem 'fluent-plugin-multi-format-parser', '1.1.0'
 gem 'fluent-plugin-opensearch', '1.0.10'
 gem 'fluent-plugin-prometheus', '2.2.0'
 gem 'fluent-plugin-systemd', '1.1.0'
-gem 'oj', '3.16.5'
+gem 'oj', '3.16.6'