diff --git a/.rubocop.yml b/.rubocop.yml
index 1a611a71b4..72ef1925e3 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,5 +1,6 @@
 inherit_from: .rubocop-bundler.yml
-
+require:
+  - rubocop-performance
 AllCops:
   Exclude:
     - bin/**/*
diff --git a/gemstash.gemspec b/gemstash.gemspec
index 562e0d66e6..c4e428676a 100644
--- a/gemstash.gemspec
+++ b/gemstash.gemspec
@@ -59,5 +59,6 @@ you push your own private gems as well."
   spec.add_development_dependency "rack-test", "~> 1.1"
   spec.add_development_dependency "rake", "~> 12.3"
   spec.add_development_dependency "rspec", "~> 3.3"
-  spec.add_development_dependency "rubocop", "= 0.67.2"
+  spec.add_development_dependency "rubocop", "= 0.68.1"
+  spec.add_development_dependency "rubocop-performance", "~> 1.1"
 end
diff --git a/lib/gemstash/gem_source.rb b/lib/gemstash/gem_source.rb
index c7d626c860..b4524b265e 100644
--- a/lib/gemstash/gem_source.rb
+++ b/lib/gemstash/gem_source.rb
@@ -29,7 +29,7 @@ class Base
       include Gemstash::Logging
 
       def_delegators :@app, :cache_control, :content_type, :env, :halt,
-        :headers, :http_client_for, :params, :redirect, :request
+                     :headers, :http_client_for, :params, :redirect, :request
 
       def initialize(app)
         @app = app
diff --git a/lib/gemstash/gem_source/upstream_source.rb b/lib/gemstash/gem_source/upstream_source.rb
index 8d818f1e50..4caa9ea050 100644
--- a/lib/gemstash/gem_source/upstream_source.rb
+++ b/lib/gemstash/gem_source/upstream_source.rb
@@ -93,8 +93,10 @@ def serve_prerelease_specs
     private
 
       def upstream
-        @upstream ||= Gemstash::Upstream.new(env["gemstash.upstream"],
-          user_agent: env["gemstash.user-agent"])
+        @upstream ||= Gemstash::Upstream.new(
+          env["gemstash.upstream"],
+          user_agent: env["gemstash.user-agent"]
+        )
       end
 
       def index_upstream
diff --git a/spec/gemstash/http_client_spec.rb b/spec/gemstash/http_client_spec.rb
index 34d744b7a8..c1a45fcd7a 100644
--- a/spec/gemstash/http_client_spec.rb
+++ b/spec/gemstash/http_client_spec.rb
@@ -82,7 +82,7 @@
       context "with a client that specifies a user agent" do
         let(:http_client) do
           Gemstash::HTTPClient.new(faraday_client,
-            user_agent: "my-agent 6.6.6")
+                                   user_agent: "my-agent 6.6.6")
         end
 
         it "forwards the user agent to the remote server" do
diff --git a/spec/gemstash/upstream_spec.rb b/spec/gemstash/upstream_spec.rb
index e396afa218..d13e357508 100644
--- a/spec/gemstash/upstream_spec.rb
+++ b/spec/gemstash/upstream_spec.rb
@@ -59,7 +59,7 @@
 
   it "supports getting user agent" do
     expect(Gemstash::Upstream.new("https://rubygems.org/",
-      user_agent: "my_user_agent").user_agent).to eq("my_user_agent")
+                                  user_agent: "my_user_agent").user_agent).to eq("my_user_agent")
   end
 
   describe ".url" do