diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 ## Building a custom docker image
 
-1. Compress Flink in `flink-dist/target/flink-1.11-SNAPSHOT-bin`: `tar czf flink-1.11.tgz flink-1.11-SNAPSHOT`
+1. Compress Flink in `flink-dist/target/flink-1.11-SNAPSHOT-bin`: `tar czf flink-1.11.tgz flink-1.11-SNAPSHOT`, or using flink download link,`https://archive.apache.org/dist/flink/`,selecting the corresponding version
 2. Start web server ``docker run -it -p 9999:9999 -v `pwd`:/data python:3.7.7-slim-buster python -m http.server 9999``
 3. Generate `Dockerfile` `./add-custom.sh -u http://localhost:9999/data/flink-1.11.tgz -n flink-1.11`
 	(If you are on a Mac or Windows, use `host.docker.internal` instead of `localhost`)