diff --git a/federation/cryptography/index.test.ts b/federation/cryptography/index.test.ts
index 3bf5fbc..e9056c7 100644
--- a/federation/cryptography/index.test.ts
+++ b/federation/cryptography/index.test.ts
@@ -180,5 +180,20 @@ describe("SignatureConstructor", () => {
             );
             expect(parts[3].split("=")[1]).toBeString();
         });
+
+        test("should correctly sign a Request", async () => {
+            const url = new URL("https://example.com");
+            const request = new Request(url.toString(), {
+                method: "GET",
+                body: body,
+            });
+            const newRequest = await ctor.sign(request);
+
+            headers = newRequest.headers;
+            expect(headers.get("Signature")).toBeDefined();
+            expect(headers.get("Date")).toBeDefined();
+
+            expect(await newRequest.text()).toBe(body);
+        });
     });
 });
diff --git a/federation/cryptography/index.ts b/federation/cryptography/index.ts
index 11f9095..7a8d4d7 100644
--- a/federation/cryptography/index.ts
+++ b/federation/cryptography/index.ts
@@ -266,6 +266,8 @@ export class SignatureConstructor {
         headers: Headers = new Headers(),
     ): Promise<Request | Headers> {
         if (requestOrMethod instanceof Request) {
+            const request = requestOrMethod.clone();
+
             const headers = await this.sign(
                 requestOrMethod.method as HttpVerb,
                 new URL(requestOrMethod.url),
@@ -273,8 +275,6 @@ export class SignatureConstructor {
                 requestOrMethod.headers,
             );
 
-            const request = requestOrMethod.clone();
-
             request.headers.set("Date", headers.get("Date") ?? "");
             request.headers.set("Signature", headers.get("Signature") ?? "");