diff --git a/packages/integrations/sitemap/src/index.ts b/packages/integrations/sitemap/src/index.ts
index f6ddbe7b37a67..0814ae0e1a3d8 100644
--- a/packages/integrations/sitemap/src/index.ts
+++ b/packages/integrations/sitemap/src/index.ts
@@ -95,8 +95,16 @@ const createPlugin = (options?: SitemapOptions): AstroIntegration => {
 							 * because `finalSiteUrl` always has trailing slash
 							 */
 							const path = finalSiteUrl.pathname + r.generate(r.pathname).substring(1);
-							const newUrl = new URL(path, finalSiteUrl).href;
-							urls.push(newUrl);
+
+							let newUrl = new URL(path, finalSiteUrl).href;
+
+							if (config.trailingSlash === 'never') {
+								urls.push(newUrl);
+							} else if (config.build.format === 'directory' && !newUrl.endsWith('/')) {
+								urls.push(newUrl + '/');
+							} else {
+								urls.push(newUrl);
+							}
 						}
 
 						return urls;
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index d10ef3497fd48..b9e26faca0177 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -680,7 +680,7 @@ importers:
         version: 3.0.1
       typescript:
         specifier: '*'
-        version: 4.9.5
+        version: 5.0.2
       unist-util-visit:
         specifier: ^4.1.0
         version: 4.1.0
@@ -15607,7 +15607,7 @@ packages:
       shiki: 0.10.1
       shiki-twoslash: 3.1.0
       tslib: 2.1.0
-      typescript: 4.9.5
+      typescript: 5.0.2
       unist-util-visit: 2.0.3
     transitivePeerDependencies:
       - supports-color
@@ -16910,11 +16910,6 @@ packages:
       for-each: 0.3.3
       is-typed-array: 1.1.10
 
-  /typescript@4.9.5:
-    resolution: {integrity: sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==}
-    engines: {node: '>=4.2.0'}
-    hasBin: true
-
   /typescript@5.0.2:
     resolution: {integrity: sha512-wVORMBGO/FAs/++blGNeAVdbNKtIh1rbBL2EyQ1+J9lClJ93KiiKe8PmFIVdXhHcyv44SL9oglmfeSsndo0jRw==}
     engines: {node: '>=12.20'}