diff --git a/wasm/.npmignore b/wasm/.npmignore
new file mode 100644
index 0000000..ccf87dd
--- /dev/null
+++ b/wasm/.npmignore
@@ -0,0 +1,6 @@
+# Ignore node_modules in the demo directory
+demo/node_modules/
+
+# Ignore development files
+.eslintrc.json
+.prettierrc
diff --git a/wasm/package.json b/wasm/package.json
index 916b98a..eaacb6a 100644
--- a/wasm/package.json
+++ b/wasm/package.json
@@ -8,7 +8,8 @@
   "files": [
     "dist",
     "README.md",
-    "demo"
+    "demo",
+    "!demo/node_modules"
   ],
   "scripts": {
     "build": "node build.js",