diff --git a/Makefile b/Makefile
index 2e083e9fd..2c1bfdc44 100644
--- a/Makefile
+++ b/Makefile
@@ -455,7 +455,7 @@ swagger_client:
 	wget -q http://central.maven.org/maven2/io/swagger/swagger-codegen-cli/2.3.1/swagger-codegen-cli-2.3.1.jar -O swagger-codegen-cli.jar
 	rm -rf harborclient
 	mkdir harborclient
-	java -jar swagger-codegen-cli.jar generate -i API/harbor/swagger.yaml -l python -o harborclient
+	java -jar swagger-codegen-cli.jar generate -i api/harbor/swagger.yaml -l python -o harborclient
 	cd harborclient; python ./setup.py install
 	pip install docker -q
 	pip freeze
diff --git a/API/harbor/swagger.yaml b/api/harbor/swagger.yaml
similarity index 100%
rename from API/harbor/swagger.yaml
rename to api/harbor/swagger.yaml
diff --git a/docs/configure_swagger.md b/docs/configure_swagger.md
index fd4c08d4d..c062ad24f 100644
--- a/docs/configure_swagger.md
+++ b/docs/configure_swagger.md
@@ -14,7 +14,7 @@ From time to time, you may need to mannually test Harbor REST API. You can deplo
 
 * Download _prepare-swagger.sh_ and _swagger.yaml_ under the _docs_ directory to your local Harbor directory, e.g. **~/harbor**.
 ```sh
-  wget https://raw.githubusercontent.com/goharbor/harbor/master/docs/prepare-swagger.sh https://raw.githubusercontent.com/goharbor/harbor/master/API/harbor/swagger.yaml
+  wget https://raw.githubusercontent.com/goharbor/harbor/master/docs/prepare-swagger.sh https://raw.githubusercontent.com/goharbor/harbor/master/api/harbor/swagger.yaml
 ```
 * Edit the script file _prepare-swagger.sh_.
 ```sh
diff --git a/make/photon/portal/Dockerfile b/make/photon/portal/Dockerfile
index 5c343da25..137836a57 100644
--- a/make/photon/portal/Dockerfile
+++ b/make/photon/portal/Dockerfile
@@ -8,7 +8,7 @@ ENV NPM_CONFIG_REGISTRY=${npm_registry}
 
 COPY src/portal/package.json /build_dir
 COPY src/portal/package-lock.json /build_dir
-COPY ./API/harbor/swagger.yaml /build_dir
+COPY ./api/harbor/swagger.yaml /build_dir
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends python-yaml=3.12-1 \
diff --git a/tests/swaggerchecker.sh b/tests/swaggerchecker.sh
index 4c5e3b864..ecb70ef95 100755
--- a/tests/swaggerchecker.sh
+++ b/tests/swaggerchecker.sh
@@ -4,9 +4,9 @@ set +e
 
 SWAGGER_ONLINE_VALIDATOR="http://online.swagger.io/validator"
 if [ $TRAVIS_EVENT_TYPE = "push" ]; then
-	HARBOR_SWAGGER_FILE="https://raw.githubusercontent.com/$TRAVIS_REPO_SLUG/$TRAVIS_COMMIT/API/harbor/swagger.yaml"
+	HARBOR_SWAGGER_FILE="https://raw.githubusercontent.com/$TRAVIS_REPO_SLUG/$TRAVIS_COMMIT/api/harbor/swagger.yaml"
 elif [ $TRAVIS_EVENT_TYPE = "pull_request" ]; then
-	HARBOR_SWAGGER_FILE="https://raw.githubusercontent.com/$TRAVIS_PULL_REQUEST_SLUG/$TRAVIS_PULL_REQUEST_SHA/API/harbor/swagger.yaml"
+	HARBOR_SWAGGER_FILE="https://raw.githubusercontent.com/$TRAVIS_PULL_REQUEST_SLUG/$TRAVIS_PULL_REQUEST_SHA/api/harbor/swagger.yaml"
 else
 	echo "* don't support this kinds of action ($TRAVIS_EVENT_TYPE), but don't fail the travis CI."
 	exit 0