diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..fa01684
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,2 @@
+export function analyzeSync(path: string): Uint8Array;
+export function analyze(path: string): Promise<Uint8Array>;