diff --git a/h5bp/location/web_performance_filename-based_cache_busting.conf b/h5bp/location/web_performance_filename-based_cache_busting.conf
index 9a27684..b788e8f 100644
--- a/h5bp/location/web_performance_filename-based_cache_busting.conf
+++ b/h5bp/location/web_performance_filename-based_cache_busting.conf
@@ -9,6 +9,6 @@
 # something like `*.css?v231`, please see:
 # https://www.stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring/
 
-location ~* (.+)\.(?:\w+)\.(bmp|css|cur|gif|ico|jpe?g|m?js|png|svgz?|webp|webmanifest)$ {
+location ~* (.+)\.(?:\w+)\.(avifs?|bmp|css|cur|gif|ico|jpe?g|m?js|a?png|svgz?|webp|webmanifest)$ {
   try_files $uri $1.$2;
 }
diff --git a/mime.types b/mime.types
index 0d039d8..a899b72 100644
--- a/mime.types
+++ b/mime.types
@@ -39,6 +39,8 @@ types {
     audio/x-realaudio                     ra;
     audio/x-wav                           wav;
     audio/x-matroska                      mka;
+    image/avif                            avif;
+    image/avif-sequence                   avifs;
     image/bmp                             bmp;
     image/gif                             gif;
     image/jpeg                            jpeg jpg;