diff --git a/src/index.js b/src/index.js
index eb43180..b15b2fc 100644
--- a/src/index.js
+++ b/src/index.js
@@ -180,10 +180,14 @@ router.post(
 		// Build screenshot options
 		const screenshotOptions = {
 			type: body.format,
-			quality: body.quality,
 			fullPage: body.fullPage,
 		};
 
+		// Quality is only supported for JPEG and WebP formats
+		if (body.format === "jpeg" || body.format === "webp") {
+			screenshotOptions.quality = body.quality;
+		}
+
 		if (body.clip) {
 			screenshotOptions.clip = body.clip;
 		}