diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 0.1.2.2
+
+* Add IANA registered `image/avif` type for `.avif` images. [#1059](https://github.com/yesodweb/wai/pull/1059)
+
 ## 0.1.2.1
 
 * Change type for JavaScript files to `text/javascript` [#1051](https://github.com/yesodweb/wai/pull/1051)
diff --git a/Network/Mime.hs b/Network/Mime.hs
--- a/Network/Mime.hs
+++ b/Network/Mime.hs
@@ -102,6 +102,8 @@
     go (ext, mimeType) =
         Map.alter (Just . maybe [ext] (ext :)) mimeType
 
+-- | Find the current table in IANA media-types registry
+-- https://www.iana.org/assignments/media-types/media-types.xhtml
 mimeAscList :: [(Extension, MimeType)]
 mimeAscList =
     [ ("123", "application/vnd.lotus-1-2-3")
@@ -150,6 +152,7 @@
     , ("atx", "application/vnd.antix.game-component")
     , ("au", "audio/basic")
     , ("avi", "video/x-msvideo")
+    , ("avif", "image/avif")
     , ("aw", "application/applixware")
     , ("azf", "application/vnd.airzip.filesecure.azf")
     , ("azs", "application/vnd.airzip.filesecure.azs")
diff --git a/mime-types.cabal b/mime-types.cabal
--- a/mime-types.cabal
+++ b/mime-types.cabal
@@ -1,5 +1,5 @@
 name:                mime-types
-version:             0.1.2.1
+version:             0.1.2.2
 synopsis:            Basic mime-type handling types and functions
 description:         API docs and the README are available at <http://www.stackage.org/package/mime-types>.
 homepage:            https://github.com/yesodweb/wai