diff --git a/src/net.ts b/src/net.ts
index cc8df6a..9388113 100644
--- a/src/net.ts
+++ b/src/net.ts
@@ -47,7 +47,7 @@ export const signedFetch = async (url: string, init: RequestInit, signedInit: Si
             headers: signedHeaders
         });
     
-        newHeaders.set("Signature", signature);
+        newHeaders.set("Authorization", `Signature ${signature}`);
     }
 
     if (Array.isArray(init.headers) || !init.headers) {