diff --git a/types/node-forge/index.d.ts b/types/node-forge/index.d.ts
index 1d9b0cb858..6e7d5d136e 100644
--- a/types/node-forge/index.d.ts
+++ b/types/node-forge/index.d.ts
@@ -15,7 +15,7 @@
 /// <reference types="node" />
 
 declare module "node-forge" {
-    type Byte = string;
+    type Byte = number;
     type Bytes = string;
     type Hex = string;
     type Base64 = string;