diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..d5223a4
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,10 @@
+interface PackageJsonOptions {
+  version?: string;
+  fullMetadata?: boolean;
+  allVersions?: boolean;
+}
+
+type PackageJson = (name: string, options?: PackageJsonOptions) => {};
+
+declare const packageJson: PackageJson;
+export = packageJson;