diff --git a/src/index.ts b/src/index.ts
index 48a375e..4ab6963 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -388,10 +388,10 @@ export class KoaResponsiveImageRouter extends Router {
 		};
 
 		const extensions = [
-			...(imageParams.lossless ? [] : ["jxl", "avif"]),
+			...(imageParams.lossless ? [] : ["avif"]),
 			"webp",
 			"png",
-			...(imageParams.lossless ? [] : ["jpg"]),
+			...(imageParams.lossless ? [] : ["jpeg"]),
 		];
 
 		let imageWidth = imgDimensions.width;
diff --git a/src/types/imageRouter.ts b/src/types/imageRouter.ts
index 79f073b..68e97b3 100644
--- a/src/types/imageRouter.ts
+++ b/src/types/imageRouter.ts
@@ -45,7 +45,7 @@ export type Task = {
 	crop: SmartCropOptions | DirectCropOptions | undefined;
 };
 
-export type correctExtension = "jpeg" | "png" | "avif" | "webp" | "jxl";
+export type correctExtension = "jpeg" | "png" | "avif" | "webp";
 
 export type ImageData = {
 	resolutions: number[];
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
index 0c5f472..27f2cc7 100644
--- a/src/utils/utils.ts
+++ b/src/utils/utils.ts
@@ -5,7 +5,7 @@ import os from "os";
 export function isCorrectExtension(
 	fileExtension: unknown
 ): fileExtension is correctExtension {
-	const extensions = ["avif", "webp", "jpeg", "png", "jxl"];
+	const extensions = ["avif", "webp", "jpeg", "png"];
 	return extensions.includes(fileExtension as string);
 }