diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..4a3a5f3
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,20 @@
+export interface UTXO {
+    txid: string | Buffer,
+    vout: number,
+    value: number,
+    nonWitnessUtxo? : Buffer,
+    witnessUtxo? : {
+        script: Buffer,
+        value: number
+    }
+}
+export interface Target {
+    address: string,
+    value?: number
+}
+export interface SelectedUTXO {
+    inputs?: UTXO[],
+    outputs?: Target[],
+    fee: number
+}
+export default function coinSelect(utxos: UTXO[], outputs: Target[], feeRate: number): SelectedUTXO;
diff --git a/package.json b/package.json
index 6cdef00..337bf4f 100644
--- a/package.json
+++ b/package.json
@@ -31,6 +31,7 @@
     "utils.js"
   ],
   "main": "index.js",
+  "types": "index.d.ts",
   "repository": {
     "type": "git",
     "url": "https://github.com/bitcoinjs/coinselect.git"