diff --git a/Gemfile b/Gemfile
index 0ef17e74..47c48ab8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,6 +4,6 @@ source 'https://rubygems.org'
 
 gem 'bundler-audit', '~> 0.9', require: false
 gem 'rake', '>= 12.3.3', require: false
-gem 'rubocop', '~> 1.55', require: false
+gem 'rubocop', '~> 1.56', require: false
 gem 'rubocop-rake', '~> 0.6', require: false
 gem 'tomlrb', '~> 2.0', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index c78d18fd..ee0c58c9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,6 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    base64 (0.1.1)
     bundler-audit (0.9.1)
       bundler (>= 1.2.0, < 3)
       thor (~> 1.0)
@@ -16,7 +17,8 @@ GEM
     rake (13.0.6)
     regexp_parser (2.8.1)
     rexml (3.2.6)
-    rubocop (1.55.1)
+    rubocop (1.56.2)
+      base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
@@ -42,7 +44,7 @@ PLATFORMS
 DEPENDENCIES
   bundler-audit (~> 0.9)
   rake (>= 12.3.3)
-  rubocop (~> 1.55)
+  rubocop (~> 1.56)
   rubocop-rake (~> 0.6)
   tomlrb (~> 2.0)