diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 70c0f43..fef7f7e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,8 +5,24 @@ before_script:
   - mkdir -p result
 
 stages:
+  - sync
   - test
 
+sync:github:
+  stage: sync
+  before_script:
+    - apt-get -y update && apt-get -y upgrade
+    - apt-get -y install openssh-client git
+    # SSH deploy key
+    - eval $(ssh-agent -s)
+    - ssh-add <(echo "$SSH_PRIVATE_KEY")
+    - mkdir -p ~/.ssh
+    - '[[ -f /.dockerenv ]] && echo -e "Host *\n\tStrictHostKeyChecking no\n\n" > ~/.ssh/config'
+  script:
+    - git clone --mirror ${CI_REPOSITORY_URL} mirror
+    - cd mirror
+    - git push --mirror ${MIRROR_GIT_URL}
+
 lint:coding-guideline:
   image: php:7.0-alpine
   stage: test