diff --git a/README.md b/README.md
index 184bf2c..2b615b2 100644
--- a/README.md
+++ b/README.md
@@ -218,9 +218,9 @@ For example:
     keepFiles: true
 ```
 
-#### ⭐️ Publish to other repository
+#### ⭐️ Deploy to external repository
 
-By default, the files are published to the respository which is running this action. If you want to publish to another repository on GitHub set the environment variable `PUBLISH_REPO` to `<username>/<repo>`.
+By default, the files are published to the respository which is running this action. If you want to publish to another repository on GitHub set the environment variable `EXTERNAL_REPOSITORY` to `<username>/<repo>`.
 
 For example:
 
@@ -229,7 +229,7 @@ For example:
   uses: peaceiris/actions-gh-pages@v2.4.0
   env:
     ACTIONS_DEPLOY_KEY: ${{ secrets.ACTIONS_DEPLOY_KEY }}
-    PUBLISH_REPO: peaceiris/peaceiris.github.io
+    EXTERNAL_REPOSITORY: peaceiris/peaceiris.github.io
     PUBLISH_BRANCH: master
     PUBLISH_DIR: ./public
 ```
diff --git a/entrypoint.sh b/entrypoint.sh
index ec5e7c8..ae1d932 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -17,10 +17,12 @@ function skip() {
 }
 
 # check values
-if [ -z "${PUBLISH_REPOSITORY}" ]; then
-    print_info "setup with PUBLISH_REPOSITORY = GITHUB_REPOSITORY"
+if [ -n "${EXTERNAL_REPOSITORY}" ]; then
+    PUBLISH_REPOSITORY=${EXTERNAL_REPOSITORY}
+else
     PUBLISH_REPOSITORY=${GITHUB_REPOSITORY}
 fi
+print_info "Deploy to ${PUBLISH_REPOSITORY}"
 
 if [ -n "${ACTIONS_DEPLOY_KEY}" ]; then