diff --git a/etc/ORG-NEWS b/etc/ORG-NEWS
index ca744b932..ee2cdfd16 100644
--- a/etc/ORG-NEWS
+++ b/etc/ORG-NEWS
@@ -587,6 +587,10 @@ link when storing any type of external link type in an Org file, not
 just =id:= links.
 
 ** New and changed options
+*** =.avif= images are not recognized in ~org-html-inline-image-rules~
+
+In =ox-html=, =.avif= image links are now inlined by default.
+
 *** New option ~org-beamer-frame-environment~
 
 The new option defines name of an alternative environment to be used
diff --git a/lisp/ox-html.el b/lisp/ox-html.el
index baca21014..de421ceda 100644
--- a/lisp/ox-html.el
+++ b/lisp/ox-html.el
@@ -861,15 +861,15 @@ link to the image."
   :type 'boolean)
 
 (defcustom org-html-inline-image-rules
-  `(("file" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp")))
-    ("http" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp")))
-    ("https" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp"))))
+  `(("file" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp" ".avif")))
+    ("http" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp" ".avif")))
+    ("https" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp" ".avif"))))
   "Rules characterizing image files that can be inlined into HTML.
 A rule consists in an association whose key is the type of link
 to consider, and value is a regexp that will be matched against
 link's path."
   :group 'org-export-html
-  :package-version '(Org . "9.5")
+  :package-version '(Org . "9.7")
   :type '(alist :key-type (string :tag "Type")
 		:value-type (regexp :tag "Path")))