diff --git a/credential/credential.d.ts b/credential/credential.d.ts
new file mode 100644
index 000000000..d8497ec14
--- /dev/null
+++ b/credential/credential.d.ts
@@ -0,0 +1,18 @@
+// Type definitions for credential
+// Project: https://github.com/ericelliott/credential
+// Definitions by: Phú <https://github.com/phuvo>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare module 'credential' {
+
+	type HashCallback = (err: Error, hash: string) => void;
+	type VerifyCallback = (err: Error, isValid: boolean) => void;
+
+	module credential {
+		function hash(password: string, callback: HashCallback): void;
+		function verify(hash: string, password: string, callback: VerifyCallback): void;
+	}
+
+	export = credential;
+
+}