diff --git a/.rubocop.yml b/.rubocop.yml
index c2f240e2..f0a8928f 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -12,6 +12,9 @@ AllCops:
     - "tmp/**/*"
     - "vendor/**/*"
 
+Layout/EmptyLinesAroundAttributeAccessor:
+  Enabled: true
+
 Layout/HashAlignment:
   EnforcedColonStyle:
     - table
@@ -29,6 +32,12 @@ Layout/SpaceAroundEqualsInParameterDefault:
 Layout/SpaceAroundMethodCallOperator:
   Enabled: true
 
+Lint/DeprecatedOpenSSLConstant:
+  Enabled: true
+
+Lint/MixedRegexpCaptureTypes:
+  Enabled: true
+
 Lint/RaiseException:
   Enabled: true
 
@@ -102,6 +111,15 @@ Style/HashTransformValues:
 Style/NumericPredicate:
   Enabled: false
 
+Style/RedundantRegexpCharacterClass:
+  Enabled: true
+
+Style/RedundantRegexpEscape:
+  Enabled: true
+
+Style/SlicingWithRange:
+  Enabled: true
+
 Style/StringLiterals:
   EnforcedStyle: double_quotes
 
diff --git a/Rakefile b/Rakefile
index d7bc9e29..72f11910 100644
--- a/Rakefile
+++ b/Rakefile
@@ -33,7 +33,7 @@ namespace :bump do
     replace_in_file ".travis.yml", /bundler -v (\S+)/ => version
     replace_in_file ".circleci/config.yml", /bundler -v (\S+)/ => version
     replace_in_file ".circleci/Dockerfile", /bundler -v (\S+)/ => version
-    replace_in_file "Gemfile.lock", /^BUNDLED WITH\n\s+([\d\.]+)$/ => version
+    replace_in_file "Gemfile.lock", /^BUNDLED WITH\n\s+([\d.]+)$/ => version
   end
 
   task :ruby do
@@ -43,9 +43,9 @@ namespace :bump do
 
     replace_in_file "tomo.gemspec", /ruby_version = ">= (.*)"/ => lowest
     replace_in_file ".rubocop.yml", /TargetRubyVersion: (.*)/ => lowest_minor
-    replace_in_file ".circleci/config.yml", %r{circleci/ruby:([\d\.]+)} => latest
-    replace_in_file ".circleci/Dockerfile", %r{circleci/ruby:([\d\.]+)} => latest
-    replace_in_file "docs/comparisons.md", /ruby version\s*\|\s*([\d\.]+)/i => lowest_minor
+    replace_in_file ".circleci/config.yml", %r{circleci/ruby:([\d.]+)} => latest
+    replace_in_file ".circleci/Dockerfile", %r{circleci/ruby:([\d.]+)} => latest
+    replace_in_file "docs/comparisons.md", /ruby version\s*\|\s*([\d.]+)/i => lowest_minor
 
     travis = YAML.safe_load(open(".travis.yml"))
     travis["rvm"] = RubyVersions.latest_supported_patches + ["ruby-head"]
diff --git a/tomo.gemspec b/tomo.gemspec
index aba02f23..6b820fbd 100644
--- a/tomo.gemspec
+++ b/tomo.gemspec
@@ -38,7 +38,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "minitest-ci", "~> 3.4"
   spec.add_development_dependency "minitest-reporters", "~> 1.3"
   spec.add_development_dependency "rake", "~> 13.0"
-  spec.add_development_dependency "rubocop", "0.82.0"
+  spec.add_development_dependency "rubocop", "0.85.1"
   spec.add_development_dependency "rubocop-minitest", "0.9.0"
   spec.add_development_dependency "rubocop-performance", "1.6.1"
 end