diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..eb5b7ff
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,2 @@
+src/
+test/
\ No newline at end of file
diff --git a/README.md b/README.md
index 8682378..bb027aa 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # SuperJWT
 
-![npm version](https://img.shields.io/badge/npm-0.0.7-brightgreen)
+![npm version](https://img.shields.io/badge/npm-0.0.9-brightgreen)
 
 Super-JWT is a Node.js package that helps authenticate users based on Superfluid streams using JSON Web Tokens (JWT).
 
@@ -9,7 +9,7 @@ Super-JWT is a Node.js package that helps authenticate users based on Superfluid
 To install Super-JWT, use npm:
 
 ```shell
-npm install super-jwt
+npm install super-jwt@latest
 ```
 
 ## Usage
@@ -119,11 +119,17 @@ type Chain =
 To publish a new version of the package to npm, run the following command:
 
 ```shell
+npm run build
+
 npm publish
 ```
 
 ### Change Log
 
+#### 0.0.9
+
+- Omit source and test files when publishing to npm to reduce package size.
+
 #### 0.0.7
 
 - Added more chains to the supported chains list. see [supported chains](#supported-chains) for more information.
diff --git a/package.json b/package.json
index 844c4f9..1333bec 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "super-jwt",
-  "version": "0.0.7",
+  "version": "0.0.9",
   "description": "Super-JWT helps to authenticate your users based on Superfluid streams using JSON Web Tokens (JWT)",
   "author": "Salman Dabbakuti",
   "license": "MIT",
diff --git a/src/index.ts b/src/index.ts
index 16842c9..14ebbdb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -102,7 +102,7 @@ export async function authenticateWithStream(
 ): Promise<AuthenticationResult> {
   const requiredParams = ["chain", "sender", "receiver", "token"];
 
-  if (!requiredParams.every((param) => param in streamPayload)) {
+  if (!requiredParams.every((param) => streamPayload.hasOwnProperty(param))) {
     throw new Error(
       "super-jwt: Missing required stream payload params: chain, sender, receiver, token"
     );
diff --git a/tsconfig.json b/tsconfig.json
index 5acf119..7321e31 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,7 +3,6 @@
   "include": ["src"],
   "exclude": ["./test/", "./node_modules/", "./dist/"],
   "compilerOptions": {
-    "allowImportingTsExtensions": true,
     "target": "es5",
     "module": "commonjs",
     "importHelpers": true,
@@ -12,7 +11,7 @@
     // output .js.map sourcemap files for consumers
     "sourceMap": true,
     // match output dir to input dir. e.g. dist/index instead of dist/src/index
-    "rootDir": "./src",
+    "rootDir": "src",
     "outDir": "dist",
     // stricter type-checking for stronger correctness. Recommended by TS
     "strict": true,
@@ -31,7 +30,6 @@
     // error out if import and file system have a casing mismatch. Recommended by TS
     "forceConsistentCasingInFileNames": true,
     // `tsdx build` ignores this option, but it is commonly used when type-checking separately with `tsc`
-    "noEmit": false,
-    "emitDeclarationOnly": true
+    "noEmit": false
   }
 }