diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 80ecb236c0..0000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,41 +0,0 @@
-# travis file
-# https://docs.travis-ci.com/user/customizing-the-build
-
-notifications:
-  email: false
-
-branches:
-  except:
-    - l10n_master
-
-language: node_js
-
-node_js:
-  - 11.0.0
-
-env:
-  - CXX=g++-4.8 NODE_ENV=production
-
-addons:
-  apt:
-    sources:
-      - ubuntu-toolchain-r-test
-    packages:
-      - g++-4.8
-
-cache:
-  directories:
-    - node_modules
-
-services:
-  - mongodb
-  - redis-server
-
-before_script:
-  - npm install
-
-  # 設定ファイルを配置
-  - cp ./.ci/default.yml ./.config
-  - cp ./.ci/test.yml ./.config
-
-  - travis_wait npm run build
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2fa78d1934..80fe89c11b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -23,5 +23,5 @@ Please use [Crowdin](https://crowdin.com/project/misskey) for localization.
 * Test codes are located in `/test`.
 
 ## Continuous integration
-Misskey uses Travis for automated test.
-Configuration files are located in `/.travis`.
+Misskey uses CircleCI for automated test.
+Configuration files are located in `/.circleci`.
diff --git a/README.md b/README.md
index 913cc6153a..29c9cb54b4 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,6 @@
 ================================================================
 
 [![CircleCI](https://circleci.com/gh/syuilo/misskey.svg?style=svg)](https://circleci.com/gh/syuilo/misskey)
-[![][travis-badge]][travis-link]
 [![][dependencies-badge]][dependencies-link]
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)](http://makeapullrequest.com)
 
@@ -124,8 +123,6 @@ Misskey is an open-source software licensed under the [GNU AGPLv3](LICENSE).
 
 [agpl-3.0]:           https://www.gnu.org/licenses/agpl-3.0.en.html
 [agpl-3.0-badge]:     https://img.shields.io/badge/license-AGPL--3.0-444444.svg?style=flat-square
-[travis-link]:        https://travis-ci.org/syuilo/misskey
-[travis-badge]:       http://img.shields.io/travis/syuilo/misskey/master.svg?style=flat-square
 [dependencies-link]:  https://david-dm.org/syuilo/misskey
 [dependencies-badge]: https://img.shields.io/david/syuilo/misskey.svg?style=flat-square