diff --git a/app/(public)/case/[caseNumber]/page.tsx b/app/(public)/case/[caseNumber]/page.tsx
index 23f9c1a..26634bd 100644
--- a/app/(public)/case/[caseNumber]/page.tsx
+++ b/app/(public)/case/[caseNumber]/page.tsx
@@ -9,6 +9,7 @@ import { fetchPostByCase, fetchRelatedPosts } from "@/lib/db/posts";
 import { CopyLinkButton } from "@/components/post/CopyLinkButton";
 import { CommentsSection } from "@/components/post/CommentsSection";
 import { ArrowLeftIcon, ArrowRightIcon } from "@/components/ui/icons";
+import { getSiteUrl } from "@/lib/utils/urls";
 
 export const revalidate = 60;
 
@@ -474,7 +475,7 @@ export default async function CasePage({ params }: PageProps) {
           {/* Share */}
           <div className="flex items-center gap-3">
             <a
-              href={`https://twitter.com/intent/tweet?text=${encodeURIComponent(`"${post.title}" — AI agent failure case ${post.caseNumber}`)}&url=${encodeURIComponent(`https://agentpostmortem.com/case/${post.caseNumber}`)}`}
+              href={`https://twitter.com/intent/tweet?text=${encodeURIComponent(`"${post.title}" — AI agent failure case ${post.caseNumber}`)}&url=${encodeURIComponent(`${getSiteUrl()}/case/${post.caseNumber}`)}`}
               target="_blank"
               rel="noopener noreferrer"
               className="font-mono text-[11px] uppercase tracking-wider text-text-tertiary hover:text-text-primary"
diff --git a/app/api/admin/posts/[id]/route.ts b/app/api/admin/posts/[id]/route.ts
index 370d5b6..c41a083 100644
--- a/app/api/admin/posts/[id]/route.ts
+++ b/app/api/admin/posts/[id]/route.ts
@@ -2,6 +2,7 @@ import { NextRequest, NextResponse } from "next/server";
 import { z } from "zod";
 import { createSupabaseAdminClient } from "@/lib/supabase/admin";
 import { sendApprovalEmail } from "@/lib/resend/send";
+import { getSiteUrl } from "@/lib/utils/urls";
 
 function checkAdminAuth(req: NextRequest): boolean {
   const auth = req.headers.get("x-admin-password");
@@ -71,7 +72,7 @@ export async function PATCH(req: NextRequest, { params }: RouteParams) {
   }
 
   if (parsed.data.status === "approved" && data.submitter_email) {
-    const caseUrl = `https://agentpostmortem.com/case/${data.case_number}`;
+    const caseUrl = `${getSiteUrl()}/case/${data.case_number}`;
     try {
       await sendApprovalEmail({
         to: data.submitter_email,
diff --git a/components/post/CopyLinkButton.tsx b/components/post/CopyLinkButton.tsx
index 1a50630..8716988 100644
--- a/components/post/CopyLinkButton.tsx
+++ b/components/post/CopyLinkButton.tsx
@@ -1,15 +1,14 @@
 "use client";
 import { useState } from "react";
 import { CheckIcon } from "@/components/ui/icons";
+import { getSiteUrl } from "@/lib/utils/urls";
 
 export function CopyLinkButton({ caseNumber }: { caseNumber: string }) {
   const [copied, setCopied] = useState(false);
   return (
     <button
       onClick={() => {
-        navigator.clipboard.writeText(
-          `https://agentpostmortem.com/case/${caseNumber}`,
-        );
+        navigator.clipboard.writeText(`${getSiteUrl()}/case/${caseNumber}`);
         setCopied(true);
         setTimeout(() => setCopied(false), 2000);
       }}