diff --git a/appendix/resources/README.md b/appendix/resources/README.md
index c099be2..8773926 100644
--- a/appendix/resources/README.md
+++ b/appendix/resources/README.md
@@ -15,7 +15,7 @@
 
 ## 实践参考
 
-* Dockerfile 参考：https://docs.docker.com/reference/builder/
+* Dockerfile 参考：https://docs.docker.com/engine/reference/builder/
 * Dockerfile 最佳实践：https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/
 
 ## 技术交流