diff --git a/apps/api/app/controllers/api/images_controller.rb b/apps/api/app/controllers/api/images_controller.rb
index 1fb26d0..05725c6 100644
--- a/apps/api/app/controllers/api/images_controller.rb
+++ b/apps/api/app/controllers/api/images_controller.rb
@@ -1,6 +1,6 @@
 class Api::ImagesController < ApplicationController
   def show
-    image = ImageService.new.show(ImageShowInputDTO.new(id: params[:id]))
+    image = ImageService.new.show(ImageShowInputDto.new(id: params[:id]))
     send_file image.file_path, type: image.content_type, disposition: "inline"
   rescue ActiveRecord::RecordNotFound
     render plain: "Not Found", status: :not_found
diff --git a/apps/api/app/controllers/files_controller.rb b/apps/api/app/controllers/files_controller.rb
index e4edee1..1059098 100644
--- a/apps/api/app/controllers/files_controller.rb
+++ b/apps/api/app/controllers/files_controller.rb
@@ -2,7 +2,7 @@ class FilesController < ApplicationController
   skip_forgery_protection
 
   def show
-    result = FileService.new.show(FileShowInputDTO.new(path: params[:path]))
+    result = FileService.new.show(FileShowInputDto.new(path: params[:path]))
     case result.type
     when :redirect  then redirect_to result.url, status: :moved_permanently
     when :file
diff --git a/apps/api/app/controllers/update_controller.rb b/apps/api/app/controllers/update_controller.rb
index 8ac7327..40432a9 100644
--- a/apps/api/app/controllers/update_controller.rb
+++ b/apps/api/app/controllers/update_controller.rb
@@ -3,7 +3,7 @@ class UpdateController < ApiController
     return render plain: "Unauthorized", status: :unauthorized unless authorized?
     return render plain: "Version not provided", status: :bad_request if params[:version].blank?
 
-    input = UpdateInputDTO.new(
+    input = UpdateInputDto.new(
       platform: params[:platform],
       name:     params[:name],
       version:  params[:version]
diff --git a/apps/api/app/dtos/file_result_dto.rb b/apps/api/app/dtos/file_result_dto.rb
index 4862e68..1809e60 100644
--- a/apps/api/app/dtos/file_result_dto.rb
+++ b/apps/api/app/dtos/file_result_dto.rb
@@ -1,4 +1,4 @@
-class FileResultDTO
+class FileResultDto
   attr_reader :type, :path, :url
 
   def initialize(type:, path: nil, url: nil)
diff --git a/apps/api/app/dtos/file_show_input_dto.rb b/apps/api/app/dtos/file_show_input_dto.rb
index 1f3e5e0..ac27669 100644
--- a/apps/api/app/dtos/file_show_input_dto.rb
+++ b/apps/api/app/dtos/file_show_input_dto.rb
@@ -1 +1 @@
-FileShowInputDTO = Struct.new(:path, keyword_init: true)
+FileShowInputDto = Struct.new(:path, keyword_init: true)
diff --git a/apps/api/app/dtos/image_show_input_dto.rb b/apps/api/app/dtos/image_show_input_dto.rb
index 40348ab..df74c61 100644
--- a/apps/api/app/dtos/image_show_input_dto.rb
+++ b/apps/api/app/dtos/image_show_input_dto.rb
@@ -1 +1 @@
-ImageShowInputDTO = Struct.new(:id, keyword_init: true)
+ImageShowInputDto = Struct.new(:id, keyword_init: true)
diff --git a/apps/api/app/dtos/update_input_dto.rb b/apps/api/app/dtos/update_input_dto.rb
index f32469b..d025174 100644
--- a/apps/api/app/dtos/update_input_dto.rb
+++ b/apps/api/app/dtos/update_input_dto.rb
@@ -1,4 +1,4 @@
-UpdateInputDTO = Struct.new(:platform, :name, :version, keyword_init: true) do
+UpdateInputDto = Struct.new(:platform, :name, :version, keyword_init: true) do
   def initialize(platform:, name:, version: nil)
     super
   end
diff --git a/apps/api/app/services/file_service.rb b/apps/api/app/services/file_service.rb
index 67cf57d..57ac62a 100644
--- a/apps/api/app/services/file_service.rb
+++ b/apps/api/app/services/file_service.rb
@@ -6,14 +6,14 @@ class FileService
 
     if File.directory?(full_path)
       index_path = full_path.join("index.html")
-      return FileResultDTO.not_found unless File.file?(index_path)
-      return FileResultDTO.redirect("/file/#{input.path.to_s.chomp("/")}/index.html")
+      return FileResultDto.not_found unless File.file?(index_path)
+      return FileResultDto.redirect("/file/#{input.path.to_s.chomp("/")}/index.html")
     end
 
     if File.file?(full_path)
-      FileResultDTO.file(full_path)
+      FileResultDto.file(full_path)
     else
-      FileResultDTO.not_found
+      FileResultDto.not_found
     end
   end
 end