diff --git a/built/index.js b/built/index.js
index 84b8227..cdfdf03 100644
--- a/built/index.js
+++ b/built/index.js
@@ -3,6 +3,7 @@ import { fileURLToPath } from 'node:url';
 import { dirname } from 'node:path';
 import fastifyStatic from '@fastify/static';
 import { createTemp } from './create-temp.js';
+import { FILE_TYPE_BROWSERSAFE } from './const.js';
 import { convertToWebpStream, webpDefault } from './image-processor.js';
 import { detectType, isMimeImage } from './file-info.js';
 import sharp from 'sharp';
@@ -148,6 +149,9 @@ async function proxyHandler(request, reply) {
         else if (file.mime === 'image/svg+xml') {
             image = convertToWebpStream(file.path, 2048, 2048);
         }
+        else if (!file.mime.startsWith('image/') || !FILE_TYPE_BROWSERSAFE.includes(file.mime)) {
+            throw new StatusError('Rejected type', 403, 'Rejected type');
+        }
         if (!image) {
             image = {
                 data: fs.createReadStream(file.path),
diff --git a/package.json b/package.json
index 7d0540a..d8f6a31 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "misskey-media-proxy",
-  "version": "0.0.6",
+  "version": "0.0.9",
   "description": "The Media Proxy for Misskey",
   "main": "built/index.js",
   "packageManager": "pnpm@7.26.0",
diff --git a/src/index.ts b/src/index.ts
index 09ef82c..aa92f22 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -191,6 +191,8 @@ async function proxyHandler(request: FastifyRequest<{ Params: { url: string; };
             };
         } else if (file.mime === 'image/svg+xml') {
             image = convertToWebpStream(file.path, 2048, 2048);
+        } else if (!file.mime.startsWith('image/') || !FILE_TYPE_BROWSERSAFE.includes(file.mime)) {
+            throw new StatusError('Rejected type', 403, 'Rejected type');
         }
 
         if (!image) {