diff --git a/build/spas.ts b/build/spas.ts
index 1afb175a51a5..2e0ff0f1a3d5 100644
--- a/build/spas.ts
+++ b/build/spas.ts
@@ -75,7 +75,7 @@ async function buildContributorSpotlight(
     };
     const context = { hyData };
 
-    const html = renderHTML(`/${locale}/${prefix}/${contributor}`, context);
+    const html = renderPage(`/${locale}/${prefix}/${contributor}`, context);
     const outPath = path.join(
       BUILD_OUT_ROOT,
       locale.toLowerCase(),
@@ -113,6 +113,10 @@ export async function buildSPAs(options: {
   // The URL isn't very important as long as it triggers the right route in the <App/>
   const url = `/${DEFAULT_LOCALE}/404.html`;
   const html = renderHTML(url, { pageNotFound: true });
+  html.replace(
+    '<link rel="canonical" href="https://developer.mozilla.org"/>',
+    ""
+  );
   const outPath = path.join(
     BUILD_OUT_ROOT,
     DEFAULT_LOCALE.toLowerCase(),
@@ -185,7 +189,7 @@ export async function buildSPAs(options: {
           noIndexing,
         };
 
-        const html = renderHTML(url, context);
+        const html = renderPage(url, context);
         const outPath = path.join(BUILD_OUT_ROOT, pathLocale, prefix);
         fs.mkdirSync(outPath, { recursive: true });
         const filePath = path.join(outPath, "index.html");
@@ -242,7 +246,7 @@ export async function buildSPAs(options: {
         pageTitle: `${frontMatter.attributes.title || ""} | ${title}`,
       };
 
-      const html = renderHTML(url, context);
+      const html = renderPage(url, context);
       const outPath = path.join(
         BUILD_OUT_ROOT,
         locale,
@@ -342,7 +346,7 @@ export async function buildSPAs(options: {
         featuredArticles,
       };
       const context = { hyData };
-      const html = renderHTML(url, context);
+      const html = renderPage(url, context);
       const outPath = path.join(BUILD_OUT_ROOT, localeLC);
       fs.mkdirSync(outPath, { recursive: true });
       const filePath = path.join(outPath, "index.html");
@@ -368,6 +372,15 @@ export async function buildSPAs(options: {
   }
 }
 
+function renderPage(url: string, context: any) {
+  const html = renderHTML(url, context);
+  html.replace(
+    '<link rel="canonical" href="https://developer.mozilla.org"/>',
+    `<link rel="canonical" href="https://developer.mozilla.org${url}"/>`
+  );
+  return html;
+}
+
 async function fetchGitHubPRs(repo, count = 5) {
   const twoDaysAgo = new Date(Date.now() - 48 * 60 * 60 * 1000);
   const pullRequestsQuery = [