diff --git a/twenty-server/.rubocop.yml b/twenty-server/.rubocop.yml
index f849f2e..bf6966d 100644
--- a/twenty-server/.rubocop.yml
+++ b/twenty-server/.rubocop.yml
@@ -15,6 +15,9 @@ AllCops:
   Include:
     - lib/*.rb
     - lib/**/*.rb
+    - libexec/*
+    - libexec/twenty/*
+    - bin/*
     - test/*_test.rb
 
 ##
diff --git a/twenty-server/lib/twenty-server/graphql.rb b/twenty-server/lib/twenty-server/graphql.rb
index 637b0aa..35a2bda 100644
--- a/twenty-server/lib/twenty-server/graphql.rb
+++ b/twenty-server/lib/twenty-server/graphql.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL
   require "graphql"
   require_relative "graphql/input"
diff --git a/twenty-server/lib/twenty-server/graphql/input.rb b/twenty-server/lib/twenty-server/graphql/input.rb
index fe32cd4..83033f9 100644
--- a/twenty-server/lib/twenty-server/graphql/input.rb
+++ b/twenty-server/lib/twenty-server/graphql/input.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Input
   include GraphQL::Types
   require_relative "input/task_input"
diff --git a/twenty-server/lib/twenty-server/graphql/input/task_input.rb b/twenty-server/lib/twenty-server/graphql/input/task_input.rb
index 4b85045..2f9c6d1 100644
--- a/twenty-server/lib/twenty-server/graphql/input/task_input.rb
+++ b/twenty-server/lib/twenty-server/graphql/input/task_input.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Input
   class TaskInput < GraphQL::Schema::InputObject
     require_relative "../type/task_status"
diff --git a/twenty-server/lib/twenty-server/graphql/mutation.rb b/twenty-server/lib/twenty-server/graphql/mutation.rb
index 7d26af9..4a201aa 100644
--- a/twenty-server/lib/twenty-server/graphql/mutation.rb
+++ b/twenty-server/lib/twenty-server/graphql/mutation.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL
   module Mutation
     require_relative "mutation/destroy_task"
diff --git a/twenty-server/lib/twenty-server/graphql/mutation/complete_task.rb b/twenty-server/lib/twenty-server/graphql/mutation/complete_task.rb
index 9e4d2ea..d1d3f22 100644
--- a/twenty-server/lib/twenty-server/graphql/mutation/complete_task.rb
+++ b/twenty-server/lib/twenty-server/graphql/mutation/complete_task.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Mutation
   class CompleteTask < GraphQL::Schema::Mutation
     argument :task_id, Int
diff --git a/twenty-server/lib/twenty-server/graphql/mutation/create_task.rb b/twenty-server/lib/twenty-server/graphql/mutation/create_task.rb
index 28002e2..cd7fdd3 100644
--- a/twenty-server/lib/twenty-server/graphql/mutation/create_task.rb
+++ b/twenty-server/lib/twenty-server/graphql/mutation/create_task.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Mutation
   class CreateTask < GraphQL::Schema::Mutation
     field :errors, [String], null: false
diff --git a/twenty-server/lib/twenty-server/graphql/mutation/destroy_task.rb b/twenty-server/lib/twenty-server/graphql/mutation/destroy_task.rb
index c237371..c801d55 100644
--- a/twenty-server/lib/twenty-server/graphql/mutation/destroy_task.rb
+++ b/twenty-server/lib/twenty-server/graphql/mutation/destroy_task.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Mutation
   class DestroyTask < GraphQL::Schema::Mutation
     argument :task_id, Int
diff --git a/twenty-server/lib/twenty-server/graphql/mutation/set_random_project_color.rb b/twenty-server/lib/twenty-server/graphql/mutation/set_random_project_color.rb
index 2eb6263..e9f7ccf 100644
--- a/twenty-server/lib/twenty-server/graphql/mutation/set_random_project_color.rb
+++ b/twenty-server/lib/twenty-server/graphql/mutation/set_random_project_color.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Mutation
   class SetRandomProjectColor < ::GraphQL::Schema::Mutation
     require_relative "../type/project"
diff --git a/twenty-server/lib/twenty-server/graphql/mutation/update_task.rb b/twenty-server/lib/twenty-server/graphql/mutation/update_task.rb
index 01da452..86c15af 100644
--- a/twenty-server/lib/twenty-server/graphql/mutation/update_task.rb
+++ b/twenty-server/lib/twenty-server/graphql/mutation/update_task.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Mutation
   class UpdateTask < GraphQL::Schema::Mutation
     field :errors, [String], null: false
diff --git a/twenty-server/lib/twenty-server/graphql/schema.rb b/twenty-server/lib/twenty-server/graphql/schema.rb
index d739346..76845a1 100644
--- a/twenty-server/lib/twenty-server/graphql/schema.rb
+++ b/twenty-server/lib/twenty-server/graphql/schema.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL
   class Schema < GraphQL::Schema
     query Type::Query
diff --git a/twenty-server/lib/twenty-server/graphql/type.rb b/twenty-server/lib/twenty-server/graphql/type.rb
index 35c2317..d418bb2 100644
--- a/twenty-server/lib/twenty-server/graphql/type.rb
+++ b/twenty-server/lib/twenty-server/graphql/type.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL
   module Type
     include ::GraphQL::Types
diff --git a/twenty-server/lib/twenty-server/graphql/type/mutation.rb b/twenty-server/lib/twenty-server/graphql/type/mutation.rb
index 08929a6..d8a2a0a 100644
--- a/twenty-server/lib/twenty-server/graphql/type/mutation.rb
+++ b/twenty-server/lib/twenty-server/graphql/type/mutation.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Type
   class Mutation < GraphQL::Schema::Object
     require_relative "../mutation/destroy_task"
diff --git a/twenty-server/lib/twenty-server/graphql/type/project.rb b/twenty-server/lib/twenty-server/graphql/type/project.rb
index 926d114..25d89fa 100644
--- a/twenty-server/lib/twenty-server/graphql/type/project.rb
+++ b/twenty-server/lib/twenty-server/graphql/type/project.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Type
   class Project < GraphQL::Schema::Object
     require_relative "task"
diff --git a/twenty-server/lib/twenty-server/graphql/type/query.rb b/twenty-server/lib/twenty-server/graphql/type/query.rb
index 14a4af2..45a6440 100644
--- a/twenty-server/lib/twenty-server/graphql/type/query.rb
+++ b/twenty-server/lib/twenty-server/graphql/type/query.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Type
   class Query < GraphQL::Schema::Object
     field :find_task, Task, null: true do
diff --git a/twenty-server/lib/twenty-server/graphql/type/task.rb b/twenty-server/lib/twenty-server/graphql/type/task.rb
index 6fe9b3c..969126a 100644
--- a/twenty-server/lib/twenty-server/graphql/type/task.rb
+++ b/twenty-server/lib/twenty-server/graphql/type/task.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Type
   class Task < GraphQL::Schema::Object
     require_relative "project"
diff --git a/twenty-server/lib/twenty-server/graphql/type/task_status.rb b/twenty-server/lib/twenty-server/graphql/type/task_status.rb
index cbf5e59..80b0df3 100644
--- a/twenty-server/lib/twenty-server/graphql/type/task_status.rb
+++ b/twenty-server/lib/twenty-server/graphql/type/task_status.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::GraphQL::Type
   class TaskStatus < GraphQL::Schema::Enum
     value :backlog
diff --git a/twenty-server/lib/twenty-server/migration/3_add_color_to_projects.rb b/twenty-server/lib/twenty-server/migration/3_add_color_to_projects.rb
index 21b6c19..40af3f5 100644
--- a/twenty-server/lib/twenty-server/migration/3_add_color_to_projects.rb
+++ b/twenty-server/lib/twenty-server/migration/3_add_color_to_projects.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddColorToProjects < ActiveRecord::Migration[7.1]
   def up
     default = Twenty::ColorableMixin.random_color
diff --git a/twenty-server/lib/twenty-server/model/mixin/colorable_mixin.rb b/twenty-server/lib/twenty-server/model/mixin/colorable_mixin.rb
index 3404a99..79f3496 100644
--- a/twenty-server/lib/twenty-server/model/mixin/colorable_mixin.rb
+++ b/twenty-server/lib/twenty-server/model/mixin/colorable_mixin.rb
@@ -1,15 +1,17 @@
+# frozen_string_literal: true
+
 module Twenty::ColorableMixin
   extend self
 
   COLORS = [
-    '#222222', '#333333', '#444444', '#555555', '#666666',
-    '#777777', '#888888', '#999999', '#AA2222', '#22AA22',
-    '#2222AA', '#AA22AA', '#CC9900', '#0099CC', '#9900CC',
-    '#FF9900', '#00CC99', '#99CC00', '#CC0099', '#990000',
-    '#112233', '#445566', '#778899', '#AA4455', '#5544AA',
-    '#88AA44', '#AA88AA', '#CCBB00', '#1155CC', '#9900BB',
-    '#DD6600', '#00BBCC', '#CC0099', '#BB3300', '#006688',
-    '#993366', '#2200AA', '#557788', '#998877', '#BB4400'
+    "#222222", "#333333", "#444444", "#555555", "#666666",
+    "#777777", "#888888", "#999999", "#AA2222", "#22AA22",
+    "#2222AA", "#AA22AA", "#CC9900", "#0099CC", "#9900CC",
+    "#FF9900", "#00CC99", "#99CC00", "#CC0099", "#990000",
+    "#112233", "#445566", "#778899", "#AA4455", "#5544AA",
+    "#88AA44", "#AA88AA", "#CCBB00", "#1155CC", "#9900BB",
+    "#DD6600", "#00BBCC", "#CC0099", "#BB3300", "#006688",
+    "#993366", "#2200AA", "#557788", "#998877", "#BB4400"
   ]
 
   def self.included(klass)
diff --git a/twenty-server/lib/twenty-server/servlet/graphql.rb b/twenty-server/lib/twenty-server/servlet/graphql.rb
index 2d0a23e..bfb2f93 100644
--- a/twenty-server/lib/twenty-server/servlet/graphql.rb
+++ b/twenty-server/lib/twenty-server/servlet/graphql.rb
@@ -1,14 +1,16 @@
+# frozen_string_literal: true
+
 class Twenty::Servlet::GraphQL < Twenty::Servlet
   ##
   # POST /servlet/graphql/
   def do_POST(req, res)
     params = JSON.parse(req.body)
     result = Twenty::GraphQL::Schema.execute(
-      params['query'],
-      variables: params['variables'],
+      params["query"],
+      variables: params["variables"],
       context: {}
     )
-    res['content_type'] = 'application/json'
+    res["content_type"] = "application/json"
     res.status = 200
     res.body = result.to_json
   end