diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1239acd..c637457 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -46,7 +46,7 @@ jobs:
         shell: bash
 
       - name: Checkout the "hidden" branch
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.1
         with:
           ref: hidden
 
diff --git a/README.md b/README.md
index 2faed51..802763c 100644
--- a/README.md
+++ b/README.md
@@ -336,6 +336,9 @@ scoop install v2ray-rules-dat
 
 ## 致谢
 
+> This product includes GeoLite2 data created by MaxMind, available from [https://www.maxmind.com](https://www.maxmind.com).
+
+- [MaxMind GeoLite2 Free IP Database](https://dev.maxmind.com/geoip/geoip2/geolite2/)
 - [@kidonng/scoop-v2ray](https://github.com/kidonng/scoop-v2ray)
 - [@v2ray/geoip](https://github.com/v2ray/geoip)
 - [@v2ray/domain-list-community](https://github.com/v2ray/domain-list-community)
@@ -350,7 +353,6 @@ scoop install v2ray-rules-dat
 - [@GeQ1an/Rules](https://github.com/GeQ1an/Rules/tree/master/QuantumultX)
 - [@lhie1/Rules](https://github.com/lhie1/Rules/tree/master)
 - [@AdAway/adaway.github.io/hosts.txt](https://github.com/AdAway/adaway.github.io/blob/master/hosts.txt)
-- [MaxMind GeoLite2 Free IP Database](https://dev.maxmind.com/geoip/geoip2/geolite2/)
 
 ## 项目 Star 数增长趋势