diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..dd11b87
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,7 @@
+import { Source } from 'callbag';
+
+
+function fromFunction<T = any>(): {emitter: {(a:T):T}, source: Source<T>};
+function fromFunction<T, U extends any[]>(func: {(...args: U):T}): {emitter: {(...args: U):T}, source: Source<T>};
+
+export default fromFunction;
\ No newline at end of file
diff --git a/package.json b/package.json
index 67947ef..7dc2bdb 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,7 @@
     "url": "git+https://github.com/krawaller/callbag-from-function.git"
   },
   "main": "index.cjs.js",
+  "types": "index.d.ts",
   "module": "index.js",
   "scripts": {
     "build": "rollup $npm_package_module -o $npm_package_main --f cjs --no-interop --external callbag-share",
@@ -25,6 +26,7 @@
     "tape": "^4.9.0"
   },
   "dependencies": {
+    "callbag": "^1.2.0",
     "callbag-share": "^1.0.0"
   }
 }