diff --git a/package.json b/package.json
index b274024..d552e8c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "misskey-media-proxy",
-  "version": "0.0.17",
+  "version": "0.0.18",
   "description": "The Media Proxy for Misskey",
   "main": "built/index.js",
   "packageManager": "pnpm@7.28.0",
diff --git a/src/image-processor.ts b/src/image-processor.ts
index 1d8ec61..dcb6d9a 100644
--- a/src/image-processor.ts
+++ b/src/image-processor.ts
@@ -16,12 +16,13 @@ export type IImageStream = {
 export type IImageStreamable = IImage | IImageStream;
 
 export const webpDefault: sharp.WebpOptions = {
-    quality: 85,
+    quality: 77,
     alphaQuality: 95,
     lossless: false,
     nearLossless: false,
     smartSubsample: true,
     mixed: true,
+    effort: 2,
 };
 
 export function convertToWebpStream(path: string, width: number, height: number, options: sharp.WebpOptions = webpDefault): IImageStream {