diff --git a/Gemfile b/Gemfile
index 0b7c4fe8a1..4df79f17da 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gemspec
 gem 'minitest', '5.19.0'
 gem 'pry', '0.14.2'
 gem 'rake', '13.0.6'
-gem 'rubocop', '1.55.1'
+gem 'rubocop', '1.56.0'
 gem 'rubocop-minitest', '0.31.0'
 gem 'rubocop-rake', '0.6.0'
 gem 'simplecov', '0.22.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index f31071d429..db34f29ef9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,6 +8,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    base64 (0.1.1)
     coderay (1.1.3)
     concurrent-ruby (1.2.2)
     docile (1.4.0)
@@ -30,7 +31,8 @@ GEM
     rake (13.0.6)
     regexp_parser (2.8.1)
     rexml (3.2.6)
-    rubocop (1.55.1)
+    rubocop (1.56.0)
+      base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
@@ -68,7 +70,7 @@ DEPENDENCIES
   minitest (= 5.19.0)
   pry (= 0.14.2)
   rake (= 13.0.6)
-  rubocop (= 1.55.1)
+  rubocop (= 1.56.0)
   rubocop-minitest (= 0.31.0)
   rubocop-rake (= 0.6.0)
   simplecov (= 0.22.0)