diff --git a/macro-railroad/README.md b/macro-railroad/README.md
new file mode 100644
index 0000000..786aba3
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+++ b/macro-railroad/README.md
@@ -0,0 +1,8 @@
+# Macro railroad
+
+This is inspired by [lukaslueg/macro_railroad_ext](https://github.com/lukaslueg/macro_railroad_ext). Kudos to [lukaslueg](https://github.com/lukaslueg).
+
+## Building
+
+- Run `make macro-railroad` in `..` directory.
+- Or run `wasm-pack build -t no-modules --no-typescript --out-name macro-railroad`.
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diff --git a/manage/README.md b/manage/README.md
index 04fd78b..bbe6649 100644
--- a/manage/README.md
+++ b/manage/README.md
@@ -2,4 +2,5 @@ Run `cargo run -- -w` to auto build manage pages.
 
 - Render html templates
 - Compile scss files
-- Copy js/css/static files to `../extension/manage`
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+
+Or run `make manage` in `..` directory.
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