diff --git a/.travis.yml b/.travis.yml
index e1bbb4b..b376e68 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,4 +8,4 @@ script:
   - bundle install --path vendor/bundle
   - bundle exec rspec
   - gem build kendama.gemspec
-  - gem install ./kendama-0.2.3.gem
+  - gem install ./kendama-1.0.0.gem
diff --git a/CHANGELOG.md b/CHANGELOG.md
index df7fd4d..4976514 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# [1.0.0] - 2023-09-12
+- openapi-generator 7.0.0でクライアントAPIを生成
+
 # [0.2.3] - 2023-06-18
 - Dependabotのtarget-branchをmainに変更
 - changelog_uriをmainブランチに向ける
diff --git a/Gemfile.lock b/Gemfile.lock
index 323c146..0c17b43 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    kendama (0.2.3)
+    kendama (1.0.0)
       typhoeus (~> 1.0, >= 1.0.1)
 
 GEM
diff --git a/README.md b/README.md
index 69b6feb..fd7133a 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ Kendama - the Ruby gem for the 国税庁API
 This SDK is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
 
 - API version: 1.0.0
-- Package version: 0.2.3
+- Package version: 1.0.0
 - Build package: org.openapitools.codegen.languages.RubyClientCodegen
 
 ## Installation
@@ -23,16 +23,16 @@ gem build kendama.gemspec
 Then either install the gem locally:
 
 ```shell
-gem install ./kendama-0.2.3.gem
+gem install ./kendama-1.0.0.gem
 ```
 
-(for development, run `gem install --dev ./kendama-0.2.3.gem` to install the development dependencies)
+(for development, run `gem install --dev ./kendama-1.0.0.gem` to install the development dependencies)
 
 or publish the gem to a gem hosting service, e.g. [RubyGems](https://rubygems.org/).
 
 Finally add this to the Gemfile:
 
-    gem 'kendama', '~> 0.2.3'
+    gem 'kendama', '~> 1.0.0'
 
 ### Install from Git
 
diff --git a/lib/kendama/version.rb b/lib/kendama/version.rb
index 475741d..4f6b153 100644
--- a/lib/kendama/version.rb
+++ b/lib/kendama/version.rb
@@ -11,5 +11,5 @@
 =end
 
 module Kendama
-  VERSION = '0.2.3'
+  VERSION = '1.0.0'
 end