diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,14 @@
 `shellmet` uses [PVP Versioning][1].
 The changelog is available [on GitHub][2].
 
+## 0.0.4.0 — Mar 23, 2021
+
+* [#20](https://github.com/kowainik/shellmet/issues/20):
+  Add `isSuccess` function to show if the command succeded.
+* [#25](https://github.com/kowainik/shellmet/issues/25):
+  Support GHC-9.0.
+* Upgrade GHC from `8.8.3` to `8.8.4`, `8.10.1` to `8.10.4`.
+
 ## 0.0.3.1 — May 7, 2020
 
 * [#18](https://github.com/kowainik/shellmet/issues/18):
diff --git a/shellmet.cabal b/shellmet.cabal
--- a/shellmet.cabal
+++ b/shellmet.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.4
 name:                shellmet
-version:             0.0.3.1
+version:             0.0.4.0
 synopsis:            Out of the shell solution for scripting in Haskell
 description:         Shellmet provides easy and convenient way to call shell commands from Haskell programs
 homepage:            https://github.com/kowainik/shellmet
@@ -9,7 +9,7 @@
 license-file:        LICENSE
 author:              Dmitrii Kovanikov
 maintainer:          Kowainik <xrom.xkov@gmail.com>
-copyright:           2019-2020 Kowainik
+copyright:           2019-2021 Kowainik
 category:            Shell, Command Line
 build-type:          Simple
 extra-doc-files:     README.md
@@ -17,15 +17,16 @@
 tested-with:         GHC == 8.2.2
                      GHC == 8.4.4
                      GHC == 8.6.5
-                     GHC == 8.8.3
-                     GHC == 8.10.1
+                     GHC == 8.8.4
+                     GHC == 8.10.4
+                     GHC == 9.0.1
 
 source-repository head
   type:                git
   location:            https://github.com/kowainik/shellmet.git
 
 common common-options
-  build-depends:       base >= 4.10.1.0 && < 4.15
+  build-depends:       base >= 4.10.1.0 && < 4.16
 
   ghc-options:         -Wall
                        -Wcompat
diff --git a/src/Shellmet.hs b/src/Shellmet.hs
--- a/src/Shellmet.hs
+++ b/src/Shellmet.hs
@@ -4,9 +4,12 @@
 {-# LANGUAGE TypeFamilies      #-}
 
 {- |
-Copyright: (c) 2019-2020 Kowainik
-SPDX-License-Identifier: MPL-2.0
-Maintainer: Kowainik <xrom.xkov@gmail.com>
+Module                  : Shellmet
+Copyright               : (c) 2019-2021 Kowainik
+SPDX-License-Identifier : MPL-2.0
+Maintainer              : Kowainik <xrom.xkov@gmail.com>
+Stability               : Stable
+Portability             : Portable
 
 This module contains neat utilities to be able to work with
 shell commands in generic and simple way using just string literals.
@@ -20,6 +23,7 @@
     ( ($|)
     , ($^)
     , ($?)
+    , isSuccess
     ) where
 
 import Control.Exception (catch)
@@ -80,3 +84,13 @@
 ($?) :: IO a -> IO a -> IO a
 action $? handler = action `catch` \(_ :: IOError) -> handler
 {-# INLINE ($?) #-}
+
+{- | Returns the indicator of if the command succeded or not.
+
+>>> isSuccess $ "echo" ["Hello world!"]
+⚙  echo 'Hello world!'
+Hello world!
+True
+-}
+isSuccess :: IO a -> IO Bool
+isSuccess action = (True <$ action) $? pure False