diff --git a/docs/release.md b/docs/release.md
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+# Release flow
+
+This is a note for repo owner.
+
+```bach
+$ git checkout -b release/vX.Y.Z
+# edit `kingpin.Version("X.Y.Z")` at speedtest.go
+$ git commit -am 'Release vX.Y.Z'
+$ git push origin release/vX.Y.Z
+```
+
+merge PR
+
+```bach
+$ git checkout master
+$ git pull origin master
+$ git tag vX.Y.Z
+$ git push origin vX.Y.Z
+# run GitHub Action to build packages and make release.
+```