diff --git a/node/node.d.ts b/node/node.d.ts
index 027c654ac..b7edca1f7 100644
--- a/node/node.d.ts
+++ b/node/node.d.ts
@@ -1622,12 +1622,12 @@ declare module "crypto" {
         setAutoPadding(auto_padding: boolean): void;
     }
     export function createSign(algorithm: string): Signer;
-    interface Signer {
+    interface Signer extends NodeJS.WritableStream {
         update(data: any): void;
         sign(private_key: string, output_format: string): string;
     }
     export function createVerify(algorith: string): Verify;
-    interface Verify {
+    interface Verify extends NodeJS.WritableStream {
         update(data: any): void;
         verify(object: string, signature: string, signature_format?: string): boolean;
     }