diff --git a/src/v3.ts b/src/v3.ts
index 83030ca2..59864bd1 100644
--- a/src/v3.ts
+++ b/src/v3.ts
@@ -4,6 +4,18 @@ import v35, { DNS, URL } from './v35.js';
 
 export { DNS, URL } from './v35.js';
 
+function v3(
+  value: string | Uint8Array,
+  namespace: UUIDTypes,
+  buf?: undefined,
+  offset?: number
+): string;
+function v3(
+  value: string | Uint8Array,
+  namespace: UUIDTypes,
+  buf: Uint8Array,
+  offset?: number
+): Uint8Array;
 function v3(value: string | Uint8Array, namespace: UUIDTypes, buf?: Uint8Array, offset?: number) {
   return v35(0x30, md5, value, namespace, buf, offset);
 }
diff --git a/src/v5.ts b/src/v5.ts
index 5e5c0e10..08968198 100644
--- a/src/v5.ts
+++ b/src/v5.ts
@@ -4,6 +4,18 @@ import v35, { DNS, URL } from './v35.js';
 
 export { DNS, URL } from './v35.js';
 
+function v5(
+  value: string | Uint8Array,
+  namespace: UUIDTypes,
+  buf?: undefined,
+  offset?: number
+): string;
+function v5(
+  value: string | Uint8Array,
+  namespace: UUIDTypes,
+  buf: Uint8Array,
+  offset?: number
+): Uint8Array;
 function v5(value: string | Uint8Array, namespace: UUIDTypes, buf?: Uint8Array, offset?: number) {
   return v35(0x50, sha1, value, namespace, buf, offset);
 }