diff --git a/.tool-versions b/.tool-versions
index 1637a0a..621374e 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-ruby 3.3.0
+ruby 3.3.1
 nodejs 20.8.1
diff --git a/Gemfile b/Gemfile
index 9b48eda..ae6b5f9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,6 @@ group :development do
   gem 'addressable', '>= 2.7.0'
   gem 'faraday', '~> 1'
   gem 'faraday_middleware'
-  gem 'lefthook', require: false
   gem 'multi_json', '>= 1.15.0'
   gem 'nokogiri', '>= 1.11.0.rc4'
   gem 'oj', '>= 2.10.4' # faster JSON
diff --git a/Gemfile.lock b/Gemfile.lock
index ec402db..8018d01 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -49,7 +49,6 @@ GEM
       concurrent-ruby (~> 1.0)
     json (2.7.1)
     language_server-protocol (3.17.0.3)
-    lefthook (1.6.1)
     mini_portile2 (2.8.6)
     minitest (5.21.2)
     multi_json (1.15.0)
@@ -108,7 +107,6 @@ DEPENDENCIES
   addressable (>= 2.7.0)
   faraday (~> 1)
   faraday_middleware
-  lefthook
   multi_json (>= 1.15.0)
   nokogiri (>= 1.11.0.rc4)
   oj (>= 2.10.4)