diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 `hslua-classes` uses [PVP Versioning][].
 
+## hslua-classes-2.3.0
+
+Released 2023-03-13.
+
+-   Require version 2.3.* of HsLua packages hslua-core and
+    hslua-marshalling.
+
 ## hslua-classes-2.2.0
 
 Released 2022-02-19.
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,7 +1,7 @@
-Copyright © 1994-2020 Lua.org, PUC-Rio.
+Copyright © 1994-2022 Lua.org, PUC-Rio.
 Copyright © 2007-2012 Gracjan Polak
 Copyright © 2012-2015 Ömer Sinan Ağacan
-Copyright © 2016-2022 Albert Krewinkel
+Copyright © 2016-2023 Albert Krewinkel
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the
diff --git a/hslua-classes.cabal b/hslua-classes.cabal
--- a/hslua-classes.cabal
+++ b/hslua-classes.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.2
 name:                hslua-classes
-version:             2.2.0
+version:             2.3.0
 synopsis:            Type classes for HsLua
 description:         Type classes for convenient marshalling and calling of
                      Lua functions.
@@ -9,22 +9,21 @@
 license:             MIT
 license-file:        LICENSE
 author:              Albert Krewinkel, Gracjan Polak, Ömer Sinan Ağacan
-maintainer:          albert+hslua@zeitkraut.de
+maintainer:          tarleb@hslua.org
 copyright:           © 2007–2012 Gracjan Polak;
                      © 2012–2016 Ömer Sinan Ağacan;
-                     © 2017-2022 Albert Krewinkel
+                     © 2017-2023 Albert Krewinkel
 category:            Foreign
 build-type:          Simple
 extra-source-files:  README.md
                    , CHANGELOG.md
-tested-with:         GHC == 8.0.2
-                   , GHC == 8.2.2
-                   , GHC == 8.4.4
+tested-with:         GHC == 8.4.4
                    , GHC == 8.6.5
                    , GHC == 8.8.4
                    , GHC == 8.10.7
-                   , GHC == 9.0.1
-                   , GHC == 9.2.1
+                   , GHC == 9.0.2
+                   , GHC == 9.2.5
+                   , GHC == 9.4.4
 
 source-repository head
   type:                git
@@ -33,12 +32,12 @@
 
 common common-options
   default-language:    Haskell2010
-  build-depends:       base              >= 4.8    && < 5
+  build-depends:       base              >= 4.11   && < 5
                      , bytestring        >= 0.10.2 && < 0.12
                      , containers        >= 0.5.9  && < 0.7
                      , exceptions        >= 0.8    && < 0.11
-                     , hslua-core        >= 2.1    && < 2.3
-                     , hslua-marshalling >= 2.1    && < 2.3
+                     , hslua-core        >= 2.1    && < 2.4
+                     , hslua-marshalling >= 2.1    && < 2.4
                      , text              >= 1.2    && < 2.1
   ghc-options:         -Wall
                        -Wincomplete-record-updates
diff --git a/src/HsLua/Class/Exposable.hs b/src/HsLua/Class/Exposable.hs
--- a/src/HsLua/Class/Exposable.hs
+++ b/src/HsLua/Class/Exposable.hs
@@ -6,9 +6,9 @@
 Module      : HsLua.Class.Exposable
 Copyright   : © 2007–2012 Gracjan Polak,
                 2012–2016 Ömer Sinan Ağacan,
-                2017-2022 Albert Krewinkel
+                2017-2023 Albert Krewinkel
 License     : MIT
-Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  : Albert Krewinkel <tarleb@hslua.org>
 
 Call Haskell functions from Lua.
 -}
diff --git a/src/HsLua/Class/Invokable.hs b/src/HsLua/Class/Invokable.hs
--- a/src/HsLua/Class/Invokable.hs
+++ b/src/HsLua/Class/Invokable.hs
@@ -4,9 +4,9 @@
 Module      : HsLua.Class.Invokable
 Copyright   : © 2007–2012 Gracjan Polak,
                 2012–2016 Ömer Sinan Ağacan,
-                2017-2022 Albert Krewinkel
+                2017-2023 Albert Krewinkel
 License     : MIT
-Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  : Albert Krewinkel <tarleb@hslua.org>
 Stability   : beta
 Portability : FlexibleInstances, ForeignFunctionInterface, ScopedTypeVariables
 
diff --git a/src/HsLua/Class/Peekable.hs b/src/HsLua/Class/Peekable.hs
--- a/src/HsLua/Class/Peekable.hs
+++ b/src/HsLua/Class/Peekable.hs
@@ -5,9 +5,9 @@
 Module      : HsLua.Class.Peekable
 Copyright   : © 2007–2012 Gracjan Polak;
               © 2012–2016 Ömer Sinan Ağacan;
-              © 2017-2022 Albert Krewinkel
+              © 2017-2023 Albert Krewinkel
 License     : MIT
-Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  : Albert Krewinkel <tarleb@hslua.org>
 Stability   : beta
 Portability : non-portable (depends on GHC)
 
diff --git a/src/HsLua/Class/Pushable.hs b/src/HsLua/Class/Pushable.hs
--- a/src/HsLua/Class/Pushable.hs
+++ b/src/HsLua/Class/Pushable.hs
@@ -4,9 +4,9 @@
 Module      : HsLua.Class.Pushable
 Copyright   : © 2007–2012 Gracjan Polak;
               © 2012–2016 Ömer Sinan Ağacan;
-              © 2017-2022 Albert Krewinkel
+              © 2017-2023 Albert Krewinkel
 License     : MIT
-Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  : Albert Krewinkel <tarleb@hslua.org>
 Stability   : beta
 Portability : FlexibleInstances, ScopedTypeVariables
 
diff --git a/src/HsLua/Class/Util.hs b/src/HsLua/Class/Util.hs
--- a/src/HsLua/Class/Util.hs
+++ b/src/HsLua/Class/Util.hs
@@ -3,9 +3,9 @@
 Module      : HsLua.Class.Util
 Copyright   : © 2007–2012 Gracjan Polak;
               © 2012–2016 Ömer Sinan Ağacan;
-              © 2017-2022 Albert Krewinkel
+              © 2017-2023 Albert Krewinkel
 License     : MIT
-Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  : Albert Krewinkel <tarleb@hslua.org>
 Stability   : beta
 Portability : non-portable (depends on GHC)
 
diff --git a/src/HsLua/Classes.hs b/src/HsLua/Classes.hs
--- a/src/HsLua/Classes.hs
+++ b/src/HsLua/Classes.hs
@@ -2,9 +2,9 @@
 Module      : HsLua.Classes
 Copyright   : © 2007–2012 Gracjan Polak;
               © 2012–2016 Ömer Sinan Ağacan;
-              © 2017-2022 Albert Krewinkel
+              © 2017-2023 Albert Krewinkel
 License     : MIT
-Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  : Albert Krewinkel <tarleb@hslua.org>
 Stability   : beta
 Portability : non-portable (depends on GHC)
 
diff --git a/test/HsLua/Class/ExposableTests.hs b/test/HsLua/Class/ExposableTests.hs
--- a/test/HsLua/Class/ExposableTests.hs
+++ b/test/HsLua/Class/ExposableTests.hs
@@ -2,9 +2,9 @@
 {-# LANGUAGE TypeApplications #-}
 {-|
 Module      : HsLua.Class.ExposableTests
-Copyright   : © 2017-2022 Albert Krewinkel
+Copyright   : © 2017-2023 Albert Krewinkel
 License     : MIT
-Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  : Albert Krewinkel <tarleb@hslua.org>
 
 Tests that Haskell functions can be exposed to and called from Lua.
 -}
diff --git a/test/HsLua/Class/InvokableTests.hs b/test/HsLua/Class/InvokableTests.hs
--- a/test/HsLua/Class/InvokableTests.hs
+++ b/test/HsLua/Class/InvokableTests.hs
@@ -1,9 +1,9 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-|
 Module      : HsLua.Class.InvokableTests
-Copyright   : © 2017-2022 Albert Krewinkel
+Copyright   : © 2017-2023 Albert Krewinkel
 License     : MIT
-Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  : Albert Krewinkel <tarleb@hslua.org>
 
 Tests that Lua functions can be called from Haskell.
 -}
diff --git a/test/HsLua/Class/PeekableTests.hs b/test/HsLua/Class/PeekableTests.hs
--- a/test/HsLua/Class/PeekableTests.hs
+++ b/test/HsLua/Class/PeekableTests.hs
@@ -2,10 +2,10 @@
 {-# LANGUAGE TypeApplications #-}
 {-|
 Module      :  HsLua.Class.PeekableTests
-Copyright   :  © 2017-2022 Albert Krewinkel
+Copyright   :  © 2017-2023 Albert Krewinkel
 License     :  MIT
 
-Maintainer  :  Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  :  Albert Krewinkel <tarleb@hslua.org>
 Stability   :  stable
 Portability :  portable
 
diff --git a/test/HsLua/Class/PushableTests.hs b/test/HsLua/Class/PushableTests.hs
--- a/test/HsLua/Class/PushableTests.hs
+++ b/test/HsLua/Class/PushableTests.hs
@@ -2,10 +2,10 @@
 {-# LANGUAGE TypeApplications  #-}
 {-|
 Module      :  HsLua.Class.PushableTests
-Copyright   :  © 2017-2022 Albert Krewinkel
+Copyright   :  © 2017-2023 Albert Krewinkel
 License     :  MIT
 
-Maintainer  :  Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  :  Albert Krewinkel <tarleb@hslua.org>
 Stability   :  stable
 Portability :  portable
 
diff --git a/test/HsLua/Class/UtilTests.hs b/test/HsLua/Class/UtilTests.hs
--- a/test/HsLua/Class/UtilTests.hs
+++ b/test/HsLua/Class/UtilTests.hs
@@ -1,11 +1,10 @@
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-|
 Module      :  HsLua.Class.UtilTests
-Copyright   :  © 2017-2022 Albert Krewinkel
+Copyright   :  © 2017-2023 Albert Krewinkel
 License     :  MIT
 
-Maintainer  :  Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  :  Albert Krewinkel <tarleb@hslua.org>
 Stability   :  stable
 Portability :  portable
 
@@ -21,10 +20,6 @@
 import Test.Tasty.HsLua ( (?:), (=:), pushLuaExpr, shouldBeResultOf
                        , shouldBeErrorMessageOf, shouldHoldForResultOf)
 import Test.Tasty (TestTree, testGroup)
-
-#if !MIN_VERSION_base(4,12,0)
-import Data.Semigroup (Semigroup ((<>)))
-#endif
 
 -- | Specifications for Attributes parsing functions.
 tests :: TestTree
diff --git a/test/HsLua/ClassesTests.hs b/test/HsLua/ClassesTests.hs
--- a/test/HsLua/ClassesTests.hs
+++ b/test/HsLua/ClassesTests.hs
@@ -3,9 +3,9 @@
 Module      : HsLua.ClassesTests
 Copyright   : © 2007–2012 Gracjan Polak;
               © 2012–2016 Ömer Sinan Ağacan;
-              © 2017-2022 Albert Krewinkel
+              © 2017-2023 Albert Krewinkel
 License     : MIT
-Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  : Albert Krewinkel <tarleb@hslua.org>
 Stability   : beta
 Portability : non-portable (depends on GHC)
 
diff --git a/test/test-hslua-classes.hs b/test/test-hslua-classes.hs
--- a/test/test-hslua-classes.hs
+++ b/test/test-hslua-classes.hs
@@ -2,9 +2,9 @@
 Module      : Main
 Copyright   : © 2007–2012 Gracjan Polak;
               © 2012–2016 Ömer Sinan Ağacan;
-              © 2017-2022 Albert Krewinkel
+              © 2017-2023 Albert Krewinkel
 License     : MIT
-Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
+Maintainer  : Albert Krewinkel <tarleb@hslua.org>
 Stability   : beta
 Portability : non-portable (depends on GHC)
 
