diff --git a/Gemfile.lock b/Gemfile.lock
index 9fd039b..96f9c05 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,6 +27,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    base64 (0.1.1)
     bindata (2.4.15)
     builder (3.2.4)
     climate_control (1.2.0)
@@ -139,7 +140,8 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.1)
-    rubocop (1.55.1)
+    rubocop (1.56.0)
+      base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
@@ -188,7 +190,7 @@ DEPENDENCIES
   pry
   rack-test (>= 0.6)
   rspec (>= 3.2)
-  rubocop (~> 1.55.1)
+  rubocop (~> 1.56.0)
   simplecov (>= 0.11.2)
   thor (~> 1.0, >= 1.0.1)
   vmpooler!
diff --git a/vmpooler.gemspec b/vmpooler.gemspec
index e4e7f45..98cbecc 100644
--- a/vmpooler.gemspec
+++ b/vmpooler.gemspec
@@ -43,7 +43,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'pry'
   s.add_development_dependency 'rack-test', '>= 0.6'
   s.add_development_dependency 'rspec', '>= 3.2'
-  s.add_development_dependency 'rubocop', '~> 1.55.1'
+  s.add_development_dependency 'rubocop', '~> 1.56.0'
   s.add_development_dependency 'simplecov', '>= 0.11.2'
   s.add_development_dependency 'thor', '~> 1.0', '>= 1.0.1'
   s.add_development_dependency 'yarjuf', '>= 2.0'