diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,11 @@
 `validation-selective` uses [PVP Versioning][1].
 The changelog is available [on GitHub][2].
 
+## 🥧 0.1.0.1 — Mar 14, 2021
+
+* [#57](https://github.com/kowainik/relude/issues/57):
+  Support GHC-9.0. Upgrade minor version to 8.10.4 and 8.8.4.
+
 ## 0.1.0.0 — May 5, 2020
 
 * [#41](https://github.com/kowainik/relude/issues/41):
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 ![Logo](https://user-images.githubusercontent.com/8126674/76859713-c0880200-6851-11ea-8bc1-bb9dee87d44f.png)
 [![GitHub CI](https://github.com/kowainik/validation-selective/workflows/CI/badge.svg)](https://github.com/kowainik/validation-selective/actions)
 [![Build status](https://img.shields.io/travis/kowainik/validation-selective.svg?logo=travis)](https://travis-ci.org/kowainik/validation-selective)
-[![Windows build status](https://ci.appveyor.com/api/projects/status/github/kowainik/validation-selective?branch=master&svg=true)](https://ci.appveyor.com/project/kowainik/validation-selective)
+[![Windows build status](https://ci.appveyor.com/api/projects/status/github/kowainik/validation-selective?branch=main&svg=true)](https://ci.appveyor.com/project/kowainik/validation-selective)
 
 [![Hackage](https://img.shields.io/hackage/v/validation-selective.svg?logo=haskell)](https://hackage.haskell.org/package/validation-selective)
 [![Stackage Lts](http://stackage.org/package/validation-selective/badge/lts)](http://stackage.org/lts/package/validation-selective)
@@ -100,5 +100,5 @@
 
 ```yaml
 extra-deps:
-  - validation-selective-0.0.0.0
+  - validation-selective-CURRENT_VERSION
 ```
diff --git a/src/Validation.hs b/src/Validation.hs
--- a/src/Validation.hs
+++ b/src/Validation.hs
@@ -7,9 +7,11 @@
 
 {- |
 Copyright:  (c) 2014 Chris Allen, Edward Kmett
-            (c) 2018-2020 Kowainik
+            (c) 2018-2021 Kowainik
 SPDX-License-Identifier: MPL-2.0
-Maintainer: Kowainik <xrom.xkov@gmail.com>
+Maintainer:  Kowainik <xrom.xkov@gmail.com>
+Stability:   Stable
+Portability: Portable
 
 Lightweight pure data validation based on 'Applicative' and 'Selective' functors.
 
@@ -415,7 +417,7 @@
     mappend = (<>)
     {-# INLINE mappend #-}
 
-{- | This instance if the most important instance for the 'Validation' data
+{- | This instance is the most important instance for the 'Validation' data
 type. It's responsible for the many implementations. And it allows to accumulate
 errors while performing validation or combining the results in the applicative
 style.
diff --git a/src/Validation/Combinators.hs b/src/Validation/Combinators.hs
--- a/src/Validation/Combinators.hs
+++ b/src/Validation/Combinators.hs
@@ -1,7 +1,9 @@
 {- |
-Copyright:  (c) 2020 Kowainik
+Copyright:  (c) 2020-2021 Kowainik
 SPDX-License-Identifier: MPL-2.0
-Maintainer: Kowainik <xrom.xkov@gmail.com>
+Maintainer:  Kowainik <xrom.xkov@gmail.com>
+Stability:   Stable
+Portability: Portable
 
 Helpful combinators to work with 'Validation' data type.
 -}
diff --git a/validation-selective.cabal b/validation-selective.cabal
--- a/validation-selective.cabal
+++ b/validation-selective.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.4
 name:                validation-selective
-version:             0.1.0.0
+version:             0.1.0.1
 synopsis:            Lighweight pure data validation based on Applicative and Selective functors
 description:
     Lighweight pure data validation based on Applicative and Selective
@@ -20,7 +20,7 @@
 license-file:        LICENSE
 author:              Dmitrii Kovanikov, Veronika Romashkina
 maintainer:          Kowainik <xrom.xkov@gmail.com>
-copyright:           2020 Kowainik
+copyright:           2020-2021 Kowainik
 category:            Validation, Selective, Data
 build-type:          Simple
 extra-doc-files:     README.md
@@ -28,14 +28,15 @@
 tested-with:         GHC == 8.4.4
                      GHC == 8.6.5
                      GHC == 8.8.3
-                     GHC == 8.10.1
+                     GHC == 8.10.4
+                     GHC == 9.0.1
 
 source-repository head
   type:                git
   location:            https://github.com/kowainik/validation-selective.git
 
 common common-options
-  build-depends:       base >= 4.11.1.0 && < 4.15
+  build-depends:       base >= 4.11.1.0 && < 4.16
 
   ghc-options:         -Wall
                        -Wcompat
@@ -100,5 +101,5 @@
   type:                exitcode-stdio-1.0
   hs-source-dirs:      test
   main-is:             Doctest.hs
-  build-depends:       doctest ^>= 0.16
+  build-depends:       doctest >= 0.16 && < 0.19
   ghc-options:         -threaded