diff --git a/boot/boot.js b/boot/boot.js
index 7570dade5..2efa58b1d 100644
--- a/boot/boot.js
+++ b/boot/boot.js
@@ -2463,6 +2463,7 @@ $tw.boot.initStartup = function(options) {
 	$tw.utils.registerFileType("image/webp","base64",".webp",{flags:["image"]});
 	$tw.utils.registerFileType("image/heic","base64",".heic",{flags:["image"]});
 	$tw.utils.registerFileType("image/heif","base64",".heif",{flags:["image"]});
+	$tw.utils.registerFileType("image/avif","base64",".avif",{flags:["image"]});
 	$tw.utils.registerFileType("image/svg+xml","utf8",".svg",{flags:["image"]});
 	$tw.utils.registerFileType("image/vnd.microsoft.icon","base64",".ico",{flags:["image"]});
 	$tw.utils.registerFileType("image/x-icon","base64",".ico",{flags:["image"]});
diff --git a/core/modules/parsers/imageparser.js b/core/modules/parsers/imageparser.js
index a964a4ba8..d594803b2 100644
--- a/core/modules/parsers/imageparser.js
+++ b/core/modules/parsers/imageparser.js
@@ -40,6 +40,7 @@ exports["image/gif"] = ImageParser;
 exports["image/webp"] = ImageParser;
 exports["image/heic"] = ImageParser;
 exports["image/heif"] = ImageParser;
+exports["image/avif"] = ImageParser;
 exports["image/x-icon"] = ImageParser;
 exports["image/vnd.microsoft.icon"] = ImageParser;