diff --git a/.github/workflows/dead-link-checker.yaml b/.github/workflows/dead-link-checker.yaml
index 19345859c8..6090dc8df7 100644
--- a/.github/workflows/dead-link-checker.yaml
+++ b/.github/workflows/dead-link-checker.yaml
@@ -29,7 +29,7 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v2
-      - run: sudo npm install -g markdown-link-check
+      - run: sudo npm install -g markdown-link-check@3.8.7
       - run: |
           for file in $(find . -name "*.md"); do
             markdown-link-check -c .dlc.json -q "$file"
diff --git a/docs/en/setup/backend/configuration-vocabulary.md b/docs/en/setup/backend/configuration-vocabulary.md
index 891517f30c..496ac71950 100644
--- a/docs/en/setup/backend/configuration-vocabulary.md
+++ b/docs/en/setup/backend/configuration-vocabulary.md
@@ -230,7 +230,7 @@ core|default|role|Option values: `Mixed/Receiver/Aggregator`. **Receiver** mode
 | - | - | port | DCS server binding port. | SW_DCS_SERVER_PORT | 80 |
 | - | - | clusterName | Cluster name when reading the latest configuration from DSC server. | SW_DCS_CLUSTER_NAME | SkyWalking|
 | - | - | period | The period of reading data from DSC server by the OAP (in seconds). | SW_DCS_PERIOD | 20 |
-| - | apollo| apolloMeta| `apollo.meta` in Apollo. | SW_CONFIG_APOLLO | http://106.12.25.204:8080 | 
+| - | apollo| apolloMeta| `apollo.meta` in Apollo. | SW_CONFIG_APOLLO | http://localhost:8080 | 
 | - | - | apolloCluster | `apollo.cluster` in Apollo. | SW_CONFIG_APOLLO_CLUSTER | default|
 | - | - | apolloEnv | `env` in Apollo. | SW_CONFIG_APOLLO_ENV | - |
 | - | - | appId | `app.id` in Apollo. | SW_CONFIG_APOLLO_APP_ID | skywalking |