diff --git a/package.json b/package.json
index b9a7649a..4fac3ca6 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
   "files": [
     "LICENSE",
     "README.md",
+    "src/htmx.d.ts",
     "dist/*.js",
     "dist/ext/*.js",
     "dist/*.js.gz"