diff --git a/app/server/lib/sendAppPage.ts b/app/server/lib/sendAppPage.ts
index 17b4e387..314486c0 100644
--- a/app/server/lib/sendAppPage.ts
+++ b/app/server/lib/sendAppPage.ts
@@ -295,7 +295,7 @@ function getPageMetadataHtmlSnippet(req: express.Request, config: GristLoadConfi
   metadataElements.push(`<meta property="og:description" content="${escapedDescription}">`);
   metadataElements.push(`<meta name="twitter:description" content="${escapedDescription}">`);
 
-  const icon = maybeDoc?.options?.icon ?? new URL('icons/grist.svg', staticBaseUrl).href;
+  const icon = maybeDoc?.options?.icon ?? new URL('icons/grist.png', staticBaseUrl).href;
   const escapedIcon = handlebars.Utils.escapeExpression(icon);
   metadataElements.push(`<meta name="thumbnail" content="${escapedIcon}">`);
   metadataElements.push(`<meta property="og:image" content="${escapedIcon}">`);
diff --git a/test/nbrowser/HomeIntro.ts b/test/nbrowser/HomeIntro.ts
index 2c5aad62..edd163b0 100644
--- a/test/nbrowser/HomeIntro.ts
+++ b/test/nbrowser/HomeIntro.ts
@@ -140,7 +140,7 @@ describe('HomeIntro', function() {
     assert.equal(await driver.find('meta[name="twitter:description"]').getAttribute('content'), expectedDescription);
     assert.equal(await driver.find('meta[property="og:description"]').getAttribute('content'), expectedDescription);
 
-    const gristIconFileName = 'grist.svg';
+    const gristIconFileName = 'grist.png';
     assert.include(await driver.find('meta[name="thumbnail"]').getAttribute('content'), gristIconFileName);
     assert.include(await driver.find('meta[name="twitter:image"]').getAttribute('content'), gristIconFileName);
     assert.include(await driver.find('meta[property="og:image"]').getAttribute('content'), gristIconFileName);
diff --git a/test/nbrowser/NewDocument.ntest.js b/test/nbrowser/NewDocument.ntest.js
index 55ef7a15..e88581bf 100644
--- a/test/nbrowser/NewDocument.ntest.js
+++ b/test/nbrowser/NewDocument.ntest.js
@@ -29,7 +29,7 @@ describe('NewDocument.ntest', function() {
     assert.equal(await driver.find('meta[name="twitter:description"]').getAttribute('content'), expectedDescription);
     assert.equal(await driver.find('meta[property="og:description"]').getAttribute('content'), expectedDescription);
 
-    const gristIconFileName = 'grist.svg';
+    const gristIconFileName = 'grist.png';
     assert.include(await driver.find('meta[name="thumbnail"]').getAttribute('content'), gristIconFileName);
     assert.include(await driver.find('meta[name="twitter:image"]').getAttribute('content'), gristIconFileName);
     assert.include(await driver.find('meta[property="og:image"]').getAttribute('content'), gristIconFileName);