diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,9 +1,14 @@
 # Changelog for commonmark-extensions
 
+## 0.2.2.1
+
+- Fix commonmark-extensions to build with GHC 9.2 (#81, Joseph C. Sible).
+  Currently `--allow-newer` is needed.
+
 ## 0.2.2
 
-  * Add footnote to gfmExtensions.  Note that this also requires
-    additional type constraints on gfmExtensions [API change].
+- Add footnote to gfmExtensions.  Note that this also requires
+  additional type constraints on gfmExtensions [API change].
 
 ## 0.2.1.2
 
diff --git a/commonmark-extensions.cabal b/commonmark-extensions.cabal
--- a/commonmark-extensions.cabal
+++ b/commonmark-extensions.cabal
@@ -1,5 +1,5 @@
 name:           commonmark-extensions
-version:        0.2.2
+version:        0.2.2.1
 synopsis:       Pure Haskell commonmark parser.
 description:
    This library provides some useful extensions to core commonmark
diff --git a/src/Commonmark/Extensions/DefinitionList.hs b/src/Commonmark/Extensions/DefinitionList.hs
--- a/src/Commonmark/Extensions/DefinitionList.hs
+++ b/src/Commonmark/Extensions/DefinitionList.hs
@@ -3,6 +3,7 @@
 {-# LANGUAGE FunctionalDependencies #-}
 {-# LANGUAGE UndecidableInstances #-}
 {-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE OverloadedStrings #-}
 module Commonmark.Extensions.DefinitionList
   ( definitionListSpec
diff --git a/src/Commonmark/Extensions/Footnote.hs b/src/Commonmark/Extensions/Footnote.hs
--- a/src/Commonmark/Extensions/Footnote.hs
+++ b/src/Commonmark/Extensions/Footnote.hs
@@ -3,6 +3,7 @@
 {-# LANGUAGE UndecidableInstances #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE OverloadedStrings #-}
 module Commonmark.Extensions.Footnote
   ( footnoteSpec
diff --git a/src/Commonmark/Extensions/Smart.hs b/src/Commonmark/Extensions/Smart.hs
--- a/src/Commonmark/Extensions/Smart.hs
+++ b/src/Commonmark/Extensions/Smart.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE CPP               #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE FlexibleInstances    #-}
+{-# LANGUAGE FlexibleContexts     #-}
 {-# LANGUAGE UndecidableInstances #-}
 module Commonmark.Extensions.Smart
   ( HasQuoted(..)
diff --git a/src/Commonmark/Extensions/TaskList.hs b/src/Commonmark/Extensions/TaskList.hs
--- a/src/Commonmark/Extensions/TaskList.hs
+++ b/src/Commonmark/Extensions/TaskList.hs
@@ -4,6 +4,7 @@
 {-# LANGUAGE UndecidableInstances #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE OverloadedStrings #-}
 module Commonmark.Extensions.TaskList
   ( taskListSpec