diff --git a/scripts/build_npm.ts b/scripts/build_npm.ts
index a0e9f98..0d02947 100644
--- a/scripts/build_npm.ts
+++ b/scripts/build_npm.ts
@@ -43,6 +43,6 @@ await build({
   postBuild() {
     // steps to run after building and before running the tests
     Deno.copyFileSync("LICENSE", "npm/LICENSE");
-    Deno.copyFileSync("readme.md", "npm/README.md");
+    Deno.copyFileSync("README.md", "npm/README.md");
   },
 });