diff --git a/index.d.ts b/index.d.ts
index cbc4448..3298a4b 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -38,3 +38,7 @@ declare module "*.jp2" {
   export = value;
 }
 
+declare module "*.avif" {
+  const value: string;
+  export = value;
+}
diff --git a/index.js b/index.js
index 97765f3..4c7e121 100644
--- a/index.js
+++ b/index.js
@@ -11,7 +11,7 @@ module.exports = ({ dynamicAssetPrefix = false, ...nextConfig } = {}) => {
         inlineImageLimit: 8192,
         assetPrefix: "",
         basePath: "",
-        fileExtensions: ["jpg", "jpeg", "png", "svg", "gif", "ico", "webp", "jp2"],
+        fileExtensions: ["jpg", "jpeg", "png", "svg", "gif", "ico", "webp", "jp2", "avif"],
       }, nextConfig);
 
       if (!options.defaultLoaders) {