diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+### 0.2.1 [2021.02.06]
+* Allow building with `base-4.15` (GHC 9.0) or later on Windows.
+
 ## 0.2 [2018.11.13]
 * Rename the `withCodePageVerbosity` function to `withCodePageOptions` to
   reflect the fact that its first argument is now an `Options` data type
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![Hackage Dependencies](https://img.shields.io/hackage-deps/v/code-page.svg)](http://packdeps.haskellers.com/reverse/code-page)
 [![Haskell Programming Language](https://img.shields.io/badge/language-Haskell-blue.svg)][Haskell.org]
 [![BSD3 License](http://img.shields.io/badge/license-BSD3-brightgreen.svg)][tl;dr Legal: BSD3]
-[![Linux build](https://img.shields.io/travis/RyanGlScott/code-page.svg)](https://travis-ci.org/RyanGlScott/code-page)
+[![Linux build](https://github.com/RyanGlScott/code-page/workflows/Haskell-CI/badge.svg)](https://github.com/RyanGlScott/code-page/actions?query=workflow%3AHaskell-CI)
 [![Windows build](https://ci.appveyor.com/api/projects/status/kaxqsgm2xx66l2q5?svg=true)](https://ci.appveyor.com/project/RyanGlScott/code-page)
 
 [Hackage: code-page]:
diff --git a/code-page.cabal b/code-page.cabal
--- a/code-page.cabal
+++ b/code-page.cabal
@@ -1,5 +1,5 @@
 name:                code-page
-version:             0.2
+version:             0.2.1
 synopsis:            Windows code page library for Haskell
 description:         This library provides two modules:
                      .
@@ -31,7 +31,9 @@
                    , GHC == 8.0.2
                    , GHC == 8.2.2
                    , GHC == 8.4.4
-                   , GHC == 8.6.2
+                   , GHC == 8.6.5
+                   , GHC == 8.8.4
+                   , GHC == 8.10.2
 
 source-repository head
   type:                git
diff --git a/src/System/Win32/CodePage.hsc b/src/System/Win32/CodePage.hsc
--- a/src/System/Win32/CodePage.hsc
+++ b/src/System/Win32/CodePage.hsc
@@ -46,7 +46,7 @@
 import Foreign.C.String
 import Foreign.Ptr
 
-import GHC.IO.Encoding.CodePage
+import GHC.IO.Encoding.CodePage (codePageEncoding, mkCodePageEncoding)
 
 import System.Win32.Console
 import System.Win32.NLS