diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 `pandoc-lua-marshal` uses [PVP Versioning][].
 
+## 0.1.5.1
+
+Release pending.
+
+-   Relax upper bound for lua and hslua.
+
 ## 0.1.5
 
 Released 2022-02-17.
diff --git a/pandoc-lua-marshal.cabal b/pandoc-lua-marshal.cabal
--- a/pandoc-lua-marshal.cabal
+++ b/pandoc-lua-marshal.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.4
 name:                pandoc-lua-marshal
-version:             0.1.5
+version:             0.1.5.1
 synopsis:            Use pandoc types in Lua
 description:         This package provides functions to marshal and unmarshal
                      pandoc document types to and from Lua.
@@ -19,7 +19,7 @@
 license-file:        LICENSE
 author:              Albert Krewinkel, John MacFarlane
 maintainer:          Albert Krewinkel <albert@zeitkraut.de>
-copyright:           © 2017-2021 Albert Krewinkel, John MacFarlane
+copyright:           © 2017-2022 Albert Krewinkel, John MacFarlane
 category:            Foreign
 build-type:          Simple
 extra-doc-files:     README.md
@@ -49,9 +49,9 @@
                      , bytestring            >= 0.10     && < 0.12
                      , containers            >= 0.6      && < 0.7
                      , exceptions            >= 0.8      && < 0.11
-                     , lua                   >= 2.1      && < 2.2
-                     , hslua                 >= 2.1      && < 2.2
-                     , hslua-marshalling     >= 2.1      && < 2.2
+                     , lua                   >= 2.1      && < 2.3
+                     , hslua                 >= 2.1      && < 2.3
+                     , hslua-marshalling     >= 2.1      && < 2.3
                      , pandoc-types          >= 1.22.1   && < 1.23
                      , safe                  >= 0.3      && < 0.4
                      , text                  >= 1.1.1.0  && < 1.3
diff --git a/src/Text/Pandoc/Lua/Marshal/AST.hs b/src/Text/Pandoc/Lua/Marshal/AST.hs
--- a/src/Text/Pandoc/Lua/Marshal/AST.hs
+++ b/src/Text/Pandoc/Lua/Marshal/AST.hs
@@ -1,5 +1,5 @@
 {- |
-Copyright: (c) 2021 Albert Krewinkel
+Copyright: (c) 2021-2022 Albert Krewinkel
 SPDX-License-Identifier: MIT
 Maintainer: Albert Krewinkel <albert@zeitkraut.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/Alignment.hs b/src/Text/Pandoc/Lua/Marshal/Alignment.hs
--- a/src/Text/Pandoc/Lua/Marshal/Alignment.hs
+++ b/src/Text/Pandoc/Lua/Marshal/Alignment.hs
@@ -1,5 +1,5 @@
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/Cell.hs b/src/Text/Pandoc/Lua/Marshal/Cell.hs
--- a/src/Text/Pandoc/Lua/Marshal/Cell.hs
+++ b/src/Text/Pandoc/Lua/Marshal/Cell.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE OverloadedStrings    #-}
 {-# LANGUAGE LambdaCase           #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/Citation.hs b/src/Text/Pandoc/Lua/Marshal/Citation.hs
--- a/src/Text/Pandoc/Lua/Marshal/Citation.hs
+++ b/src/Text/Pandoc/Lua/Marshal/Citation.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE OverloadedStrings    #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/CitationMode.hs b/src/Text/Pandoc/Lua/Marshal/CitationMode.hs
--- a/src/Text/Pandoc/Lua/Marshal/CitationMode.hs
+++ b/src/Text/Pandoc/Lua/Marshal/CitationMode.hs
@@ -1,5 +1,5 @@
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/Content.hs b/src/Text/Pandoc/Lua/Marshal/Content.hs
--- a/src/Text/Pandoc/Lua/Marshal/Content.hs
+++ b/src/Text/Pandoc/Lua/Marshal/Content.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE LambdaCase        #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/Filter.hs b/src/Text/Pandoc/Lua/Marshal/Filter.hs
--- a/src/Text/Pandoc/Lua/Marshal/Filter.hs
+++ b/src/Text/Pandoc/Lua/Marshal/Filter.hs
@@ -3,7 +3,7 @@
 {-# LANGUAGE TypeApplications     #-}
 {-# LANGUAGE ScopedTypeVariables  #-}
 {- |
-Copyright  : © 2021 Albert Krewinkel
+Copyright  : © 2021-2022 Albert Krewinkel
 License    : MIT
 Maintainer : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/Format.hs b/src/Text/Pandoc/Lua/Marshal/Format.hs
--- a/src/Text/Pandoc/Lua/Marshal/Format.hs
+++ b/src/Text/Pandoc/Lua/Marshal/Format.hs
@@ -1,5 +1,5 @@
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/Inline.hs-boot b/src/Text/Pandoc/Lua/Marshal/Inline.hs-boot
--- a/src/Text/Pandoc/Lua/Marshal/Inline.hs-boot
+++ b/src/Text/Pandoc/Lua/Marshal/Inline.hs-boot
@@ -1,9 +1,4 @@
 {-# LANGUAGE FlexibleContexts     #-}
-{-# LANGUAGE LambdaCase           #-}
-{-# LANGUAGE OverloadedStrings    #-}
-{-# LANGUAGE ScopedTypeVariables  #-}
-{-# LANGUAGE TypeApplications     #-}
-{-# LANGUAGE TupleSections        #-}
 module Text.Pandoc.Lua.Marshal.Inline
   ( -- * Single Inline elements
     peekInline
diff --git a/src/Text/Pandoc/Lua/Marshal/List.hs b/src/Text/Pandoc/Lua/Marshal/List.hs
--- a/src/Text/Pandoc/Lua/Marshal/List.hs
+++ b/src/Text/Pandoc/Lua/Marshal/List.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE LambdaCase           #-}
 {-# LANGUAGE OverloadedStrings    #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/ListAttributes.hs b/src/Text/Pandoc/Lua/Marshal/ListAttributes.hs
--- a/src/Text/Pandoc/Lua/Marshal/ListAttributes.hs
+++ b/src/Text/Pandoc/Lua/Marshal/ListAttributes.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE OverloadedStrings    #-}
 {-# LANGUAGE TupleSections        #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/MathType.hs b/src/Text/Pandoc/Lua/Marshal/MathType.hs
--- a/src/Text/Pandoc/Lua/Marshal/MathType.hs
+++ b/src/Text/Pandoc/Lua/Marshal/MathType.hs
@@ -1,5 +1,5 @@
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/MetaValue.hs b/src/Text/Pandoc/Lua/Marshal/MetaValue.hs
--- a/src/Text/Pandoc/Lua/Marshal/MetaValue.hs
+++ b/src/Text/Pandoc/Lua/Marshal/MetaValue.hs
@@ -3,7 +3,7 @@
 {-# LANGUAGE ScopedTypeVariables  #-}
 {-# LANGUAGE TypeApplications     #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/Pandoc.hs b/src/Text/Pandoc/Lua/Marshal/Pandoc.hs
--- a/src/Text/Pandoc/Lua/Marshal/Pandoc.hs
+++ b/src/Text/Pandoc/Lua/Marshal/Pandoc.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE OverloadedStrings    #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/QuoteType.hs b/src/Text/Pandoc/Lua/Marshal/QuoteType.hs
--- a/src/Text/Pandoc/Lua/Marshal/QuoteType.hs
+++ b/src/Text/Pandoc/Lua/Marshal/QuoteType.hs
@@ -1,5 +1,5 @@
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/Row.hs b/src/Text/Pandoc/Lua/Marshal/Row.hs
--- a/src/Text/Pandoc/Lua/Marshal/Row.hs
+++ b/src/Text/Pandoc/Lua/Marshal/Row.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE OverloadedStrings    #-}
 {-# LANGUAGE LambdaCase           #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/Shared.hs b/src/Text/Pandoc/Lua/Marshal/Shared.hs
--- a/src/Text/Pandoc/Lua/Marshal/Shared.hs
+++ b/src/Text/Pandoc/Lua/Marshal/Shared.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE FlexibleContexts     #-}
 {-# LANGUAGE OverloadedStrings    #-}
 {- |
-Copyright   : © 2021 Albert Krewinkel
+Copyright   : © 2021-2022 Albert Krewinkel
 License     : MIT
 Maintainer  : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/SimpleTable.hs b/src/Text/Pandoc/Lua/Marshal/SimpleTable.hs
--- a/src/Text/Pandoc/Lua/Marshal/SimpleTable.hs
+++ b/src/Text/Pandoc/Lua/Marshal/SimpleTable.hs
@@ -2,7 +2,7 @@
 {-# LANGUAGE OverloadedStrings    #-}
 {-# LANGUAGE ScopedTypeVariables  #-}
 {- |
-Copyright   : © 2021 Albert Krewinkel
+Copyright   : © 2021-2022 Albert Krewinkel
 License     : MIT
 Maintainer  : Albert Krewinkel <albert@zeitkraut.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/TableFoot.hs b/src/Text/Pandoc/Lua/Marshal/TableFoot.hs
--- a/src/Text/Pandoc/Lua/Marshal/TableFoot.hs
+++ b/src/Text/Pandoc/Lua/Marshal/TableFoot.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE OverloadedStrings    #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/TableHead.hs b/src/Text/Pandoc/Lua/Marshal/TableHead.hs
--- a/src/Text/Pandoc/Lua/Marshal/TableHead.hs
+++ b/src/Text/Pandoc/Lua/Marshal/TableHead.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE OverloadedStrings    #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
 
diff --git a/src/Text/Pandoc/Lua/Marshal/TableParts.hs b/src/Text/Pandoc/Lua/Marshal/TableParts.hs
--- a/src/Text/Pandoc/Lua/Marshal/TableParts.hs
+++ b/src/Text/Pandoc/Lua/Marshal/TableParts.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE LambdaCase           #-}
 {-# LANGUAGE OverloadedStrings    #-}
 {- |
-Copyright               : © 2021 Albert Krewinkel
+Copyright               : © 2021-2022 Albert Krewinkel
 SPDX-License-Identifier : MIT
 Maintainer              : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>