diff --git a/includes/Api/ApiFormatManifest.php b/includes/Api/ApiFormatManifest.php
new file mode 100644
index 00000000..2d5b07f5
--- /dev/null
+++ b/includes/Api/ApiFormatManifest.php
@@ -0,0 +1,40 @@
+<?php
+/**
+ * Citizen - A responsive skin developed for the Star Citizen Wiki
+ *
+ * This file is part of Citizen.
+ *
+ * Citizen is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Citizen is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Citizen.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * @file
+ */
+
+namespace MediaWiki\Skins\Citizen\Api;
+
+use ApiFormatJson;
+
+/**
+ * T282500
+ * TODO: This should be merged to core
+ */
+class ApiFormatManifest extends ApiFormatJson {
+	/**
+	 * Return the proper content-type
+	 *
+	 * @return string
+	 */
+	public function getMimeType() {
+		return 'application/manifest+json';
+	}
+}
diff --git a/includes/Api/ApiWebappManifest.php b/includes/Api/ApiWebappManifest.php
index d79cc79f..ba53b3b5 100644
--- a/includes/Api/ApiWebappManifest.php
+++ b/includes/Api/ApiWebappManifest.php
@@ -23,7 +23,7 @@
 namespace MediaWiki\Skins\Citizen\Api;
 
 use ApiBase;
-use ApiFormatJson;
+use MediaWiki\Skins\Citizen\Api\ApiFormatManifest;
 use MediaWiki\MediaWikiServices;
 use SpecialPage;
 use Title;
@@ -31,6 +31,9 @@ use Title;
 /**
  * Based on the MobileFrontend extension
  * Return the webapp manifest for this wiki
+ * 
+ * T282500
+ * TODO: This should be merged to core
  */
 class ApiWebappManifest extends ApiBase {
 	/**
@@ -144,9 +147,9 @@ class ApiWebappManifest extends ApiBase {
 	/**
 	 * Get the JSON printer
 	 *
-	 * @return ApiFormatJson
+	 * @return ApiFormatManifest
 	 */
 	public function getCustomPrinter() {
-		return new ApiFormatJson( $this->getMain(), 'json' );
+		return new ApiFormatManifest( $this->getMain(), 'json' );
 	}
 }