diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog for doctest-driver-gen
 
+## 0.3.0.8
+
+* Relax `build-depends` to allow `base-4.x`.
+
 ## 0.3.0.7
 
 * Update `build-depends` to allow `base-4.18.0.0`.
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright Hexirp (c) 2017-2021
+Copyright Hexirp (c) 2017-2023
 
 All rights reserved.
 
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 
 doctest-driver-gen is a doctest's driver file generator. It lets you automatically generate driver file for [doctest's cabal integration](https://github.com/sol/doctest/blob/f1f6c4149283036a55f9ce7f50439fabf0b9a0ab/README.md#cabal-integration).
 
-Versions of doctest available in this library: `>= 0.7 && < 0.12 || >= 0.13 && < 0.22`
+Versions of doctest available in this library: `>= 0.7 && < 0.12 || >= 0.13 && < 0.23`
 
 ## Usage
 
diff --git a/doctest-driver-gen.cabal b/doctest-driver-gen.cabal
--- a/doctest-driver-gen.cabal
+++ b/doctest-driver-gen.cabal
@@ -1,5 +1,5 @@
 name:                doctest-driver-gen
-version:             0.3.0.7
+version:             0.3.0.8
 synopsis:            Generate driver file for doctest's cabal integration
 description:         doctest-driver-gen is a doctest's driver file generator.
                      It lets you automatically generate driver file for
@@ -9,7 +9,7 @@
 license-file:        LICENSE
 author:              Hexirp
 maintainer:          https://github.com/Hexirp/doctest-driver-gen/issues
-copyright:           (C) Hexirp 2017-2021
+copyright:           (C) Hexirp 2017-2023
 category:            Testing
 build-type:          Simple
 extra-source-files:  README.md, CHANGELOG.md
@@ -37,9 +37,9 @@
 library
   hs-source-dirs:      src
   exposed-modules:     Test.DocTest.Gen
-  build-depends:       base >= 4.0 && < 4.19
+  build-depends:       base >= 4.0 && < 5
                        -- Versions of doctest available in this library
-                       -- , doctest >= 0.7 && < 0.12 || >= 0.13 && < 0.22
+                       -- , doctest >= 0.7 && < 0.12 || >= 0.13 && < 0.23
   ghc-options:         -Wall
   default-language:    Haskell2010
 
@@ -70,4 +70,4 @@
 source-repository this
   type:     git
   location: https://github.com/Hexirp/doctest-driver-gen
-  tag:      0.3.0.7
+  tag:      0.3.0.8