diff --git a/src/net.ts b/src/net.ts
index 8749b5b..94d3042 100644
--- a/src/net.ts
+++ b/src/net.ts
@@ -19,16 +19,16 @@ export interface SignedInit {
 
 // TODO: Handle redirects.
 export const signedFetch = async (url: string, init: RequestInit, signedInit: SignedInit): Promise<globalThis.Response> => {
-    const now = new Date().toUTCString();
-
     const signedHeaders: HeadersInit = [
-        ["Date", now]
+        ["Date", new Date().toUTCString()]
     ];
 
     const headerNames = ["(request-target)", "host", "date"];
 
     if (init.method === "POST") {
-        headerNames.push("digest");
+        headerNames.push("content-type", "digest");
+
+        signedHeaders.push(["Content-Type", `application/ld+json; profile="${CONTEXT}"`]);
 
         if (init.body) {
             if (signedInit.digest) {
@@ -62,8 +62,7 @@ export const signedFetch = async (url: string, init: RequestInit, signedInit: Si
     const newHeaders: HeadersInit = 
         [
             ...signedHeaders,
-            ["Signature", signature],
-            ["Content-Type", `application/ld+json; profile="${CONTEXT}"`]
+            ["Signature", signature]
         ]
     ;