diff --git a/.gitignore b/.gitignore
index 4a824fc..55fe6d9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -130,4 +130,6 @@ dist
 .yarn/install-state.gz
 .pnp.*
 
-.idea
\ No newline at end of file
+.idea
+*.d.ts
+*.d.ts.map
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index d8f1b39..903a89d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,13 +1,29 @@
 {
   "name": "datelative",
-  "version": "0.0.1",
+  "version": "0.0.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "datelative",
-      "version": "0.0.1",
-      "license": "ISC"
+      "version": "0.0.3",
+      "license": "MIT",
+      "devDependencies": {
+        "typescript": "^5.3.3"
+      }
+    },
+    "node_modules/typescript": {
+      "version": "5.3.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.3.3.tgz",
+      "integrity": "sha512-pXWcraxM0uxAS+tN0AG/BF2TyqmHO014Z070UsJ+pFvYuRSq8KH8DmWpnbXe0pEPDHXZV3FcAbJkijJ5oNEnWw==",
+      "dev": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 35a7032..e24df65 100644
--- a/package.json
+++ b/package.json
@@ -1,17 +1,26 @@
 {
   "name": "datelative",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "description": "A library that converts relative string text to JavaScript dates",
   "main": "index.js",
+  "types": "index.d.ts",
   "type": "module",
   "scripts": {
     "test": "node --test",
-    "test:watch": "node --test --watch"
+    "test:watch": "node --test --watch",
+    "prepublishOnly": "npx tsc"
   },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/onhate/datelative.git"
   },
+  "files": [
+    "index.js",
+    "index.d.ts",
+    "index.d.ts.map",
+    "README.md",
+    "package.json"
+  ],
   "keywords": [
     "date",
     "relative",
@@ -23,5 +32,7 @@
     "url": "https://github.com/onhate/datelative/issues"
   },
   "homepage": "https://github.com/onhate/datelative#readme",
-  "dependencies": {}
-}
\ No newline at end of file
+  "devDependencies": {
+    "typescript": "^5.3.3"
+  }
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..712ee16
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "include": [
+    "index.js"
+  ],
+  "compilerOptions": {
+    "allowJs": true,
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "declarationMap": true
+  }
+}
\ No newline at end of file