diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2e508334..d1f325f5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 0.0.1.2
+
+- Updated version bounds for dependencies.
+
 # 0.0.1.1
 
 - Updated version bounds for dependencies.
diff --git a/LICENSE b/LICENSE
index 54d2c45d..a1faed41 100644
--- a/LICENSE
+++ b/LICENSE
@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright © 2022–2023 Jonathan Knowles
+   Copyright © 2022–2024 Jonathan Knowles
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/monoidmap.cabal b/monoidmap.cabal
index 0e29b134..9fafa348 100644
--- a/monoidmap.cabal
+++ b/monoidmap.cabal
@@ -1,12 +1,12 @@
 cabal-version:  3.0
 name:           monoidmap
-version:        0.0.1.1
+version:        0.0.1.2
 bug-reports:    https://github.com/jonathanknowles/monoidmap/issues
 license:        Apache-2.0
 license-file:   LICENSE
 author:         Jonathan Knowles
 maintainer:     mail@jonathanknowles.net
-copyright:      2022–2023 Jonathan Knowles
+copyright:      2022–2024 Jonathan Knowles
 category:       Data Structures
 synopsis:       Monoidal map type
 description:
@@ -19,7 +19,7 @@ extra-doc-files:
 common dependency-base
     build-depends:base                          >= 4.14.3.0   && < 4.20
 common dependency-containers
-    build-depends:containers                    >= 0.6.5.1    && < 0.7
+    build-depends:containers                    >= 0.6.5.1    && < 0.8
 common dependency-deepseq
     build-depends:deepseq                       >= 1.4.4.0    && < 1.6
 common dependency-groups
diff --git a/src/examples/Examples/MultiMap.hs b/src/examples/Examples/MultiMap.hs
index 6ea5e2a4..c6afcbae 100644
--- a/src/examples/Examples/MultiMap.hs
+++ b/src/examples/Examples/MultiMap.hs
@@ -1,6 +1,6 @@
 {-# OPTIONS_GHC -fno-warn-unused-imports #-}
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- Provides the 'MultiMap' class, which models a total relation from unique
diff --git a/src/examples/Examples/MultiMap/Class.hs b/src/examples/Examples/MultiMap/Class.hs
index 60e47f70..f3d1feb3 100644
--- a/src/examples/Examples/MultiMap/Class.hs
+++ b/src/examples/Examples/MultiMap/Class.hs
@@ -1,5 +1,5 @@
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- Provides the 'MultiMap' class, which models a total relation from unique
diff --git a/src/examples/Examples/MultiMap/Instances/MultiMap1.hs b/src/examples/Examples/MultiMap/Instances/MultiMap1.hs
index 16035e92..7dfe8338 100644
--- a/src/examples/Examples/MultiMap/Instances/MultiMap1.hs
+++ b/src/examples/Examples/MultiMap/Instances/MultiMap1.hs
@@ -1,5 +1,5 @@
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- An __unlawful__ implementation of 'MultiMap', implemented in terms of 'Map'
diff --git a/src/examples/Examples/MultiMap/Instances/MultiMap2.hs b/src/examples/Examples/MultiMap/Instances/MultiMap2.hs
index b0dbd625..a2fd411c 100644
--- a/src/examples/Examples/MultiMap/Instances/MultiMap2.hs
+++ b/src/examples/Examples/MultiMap/Instances/MultiMap2.hs
@@ -1,5 +1,5 @@
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- A __lawful__ implementation of 'MultiMap', implemented in terms of 'Map' and
diff --git a/src/examples/Examples/MultiMap/Instances/MultiMap3.hs b/src/examples/Examples/MultiMap/Instances/MultiMap3.hs
index 7167bba0..5c270e78 100644
--- a/src/examples/Examples/MultiMap/Instances/MultiMap3.hs
+++ b/src/examples/Examples/MultiMap/Instances/MultiMap3.hs
@@ -1,5 +1,5 @@
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- A __lawful__ implementation of 'MultiMap', implemented in terms of 'Map' and
diff --git a/src/examples/Examples/MultiMap/Instances/MultiMap4.hs b/src/examples/Examples/MultiMap/Instances/MultiMap4.hs
index 9177f9c3..9414ef59 100644
--- a/src/examples/Examples/MultiMap/Instances/MultiMap4.hs
+++ b/src/examples/Examples/MultiMap/Instances/MultiMap4.hs
@@ -1,5 +1,5 @@
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- A __lawful__ implementation of 'MultiMap', implemented in terms of
diff --git a/src/examples/Examples/MultiSet.hs b/src/examples/Examples/MultiSet.hs
index 8a207065..da48b180 100644
--- a/src/examples/Examples/MultiSet.hs
+++ b/src/examples/Examples/MultiSet.hs
@@ -1,5 +1,5 @@
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- A multiset type, implemented in terms of 'MonoidMap'.
diff --git a/src/examples/Examples/NestedMonoidMap.hs b/src/examples/Examples/NestedMonoidMap.hs
index 409db78c..d874b89d 100644
--- a/src/examples/Examples/NestedMonoidMap.hs
+++ b/src/examples/Examples/NestedMonoidMap.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE TypeSynonymInstances #-}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- A nested map with compound keys, implemented in terms of 'MonoidMap'.
diff --git a/src/examples/Examples/RecoveredMap.hs b/src/examples/Examples/RecoveredMap.hs
index c3681f68..4e3ec40a 100644
--- a/src/examples/Examples/RecoveredMap.hs
+++ b/src/examples/Examples/RecoveredMap.hs
@@ -2,7 +2,7 @@
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- An ordinary left-biased map similar to 'Map', implemented in terms of
diff --git a/src/internal/Data/MonoidMap/Internal.hs b/src/internal/Data/MonoidMap/Internal.hs
index 20bd05f4..3ab8729e 100644
--- a/src/internal/Data/MonoidMap/Internal.hs
+++ b/src/internal/Data/MonoidMap/Internal.hs
@@ -5,7 +5,7 @@
 {- HLINT ignore "Redundant bracket" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- Provides /internal/ operations for the 'MonoidMap' type.
diff --git a/src/internal/Data/MonoidMap/Unsafe.hs b/src/internal/Data/MonoidMap/Unsafe.hs
index 96b0ceb9..8a89119b 100644
--- a/src/internal/Data/MonoidMap/Unsafe.hs
+++ b/src/internal/Data/MonoidMap/Unsafe.hs
@@ -1,7 +1,7 @@
 {-# OPTIONS_GHC -fno-warn-unused-imports #-}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- Provides /unsafe/ operations for the 'MonoidMap' type.
diff --git a/src/public/Data/MonoidMap.hs b/src/public/Data/MonoidMap.hs
index 6595b8af..cbe66f3b 100644
--- a/src/public/Data/MonoidMap.hs
+++ b/src/public/Data/MonoidMap.hs
@@ -1,7 +1,7 @@
 {-# OPTIONS_GHC -fno-warn-unused-imports #-}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap
diff --git a/src/test/Data/MonoidMap/AccessSpec.hs b/src/test/Data/MonoidMap/AccessSpec.hs
index ee109d71..4cce02d0 100644
--- a/src/test/Data/MonoidMap/AccessSpec.hs
+++ b/src/test/Data/MonoidMap/AccessSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.AccessSpec
diff --git a/src/test/Data/MonoidMap/ClassSpec.hs b/src/test/Data/MonoidMap/ClassSpec.hs
index 45c2ad30..53e762f1 100644
--- a/src/test/Data/MonoidMap/ClassSpec.hs
+++ b/src/test/Data/MonoidMap/ClassSpec.hs
@@ -1,7 +1,7 @@
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.ClassSpec
diff --git a/src/test/Data/MonoidMap/ComparisonSpec.hs b/src/test/Data/MonoidMap/ComparisonSpec.hs
index b2a1289b..77a224c9 100644
--- a/src/test/Data/MonoidMap/ComparisonSpec.hs
+++ b/src/test/Data/MonoidMap/ComparisonSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.ComparisonSpec
diff --git a/src/test/Data/MonoidMap/ConversionSpec.hs b/src/test/Data/MonoidMap/ConversionSpec.hs
index 511564d3..6b9bf3ab 100644
--- a/src/test/Data/MonoidMap/ConversionSpec.hs
+++ b/src/test/Data/MonoidMap/ConversionSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.ConversionSpec
diff --git a/src/test/Data/MonoidMap/DistributivitySpec.hs b/src/test/Data/MonoidMap/DistributivitySpec.hs
index 6033e0c6..144ba5d5 100644
--- a/src/test/Data/MonoidMap/DistributivitySpec.hs
+++ b/src/test/Data/MonoidMap/DistributivitySpec.hs
@@ -4,7 +4,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.DistributivitySpec
diff --git a/src/test/Data/MonoidMap/ExampleSpec.hs b/src/test/Data/MonoidMap/ExampleSpec.hs
index d2e6bc7b..dd34706d 100644
--- a/src/test/Data/MonoidMap/ExampleSpec.hs
+++ b/src/test/Data/MonoidMap/ExampleSpec.hs
@@ -5,7 +5,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.ExampleSpec
diff --git a/src/test/Data/MonoidMap/FilterSpec.hs b/src/test/Data/MonoidMap/FilterSpec.hs
index 4416c393..aa28c9f2 100644
--- a/src/test/Data/MonoidMap/FilterSpec.hs
+++ b/src/test/Data/MonoidMap/FilterSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.FilterSpec
diff --git a/src/test/Data/MonoidMap/IntersectionSpec.hs b/src/test/Data/MonoidMap/IntersectionSpec.hs
index ee7c16be..ade7723a 100644
--- a/src/test/Data/MonoidMap/IntersectionSpec.hs
+++ b/src/test/Data/MonoidMap/IntersectionSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.IntersectionSpec
diff --git a/src/test/Data/MonoidMap/MapSpec.hs b/src/test/Data/MonoidMap/MapSpec.hs
index a7a2cf9a..60e384be 100644
--- a/src/test/Data/MonoidMap/MapSpec.hs
+++ b/src/test/Data/MonoidMap/MapSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.MapSpec
diff --git a/src/test/Data/MonoidMap/MembershipSpec.hs b/src/test/Data/MonoidMap/MembershipSpec.hs
index 51a2784f..30e61e81 100644
--- a/src/test/Data/MonoidMap/MembershipSpec.hs
+++ b/src/test/Data/MonoidMap/MembershipSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.MembershipSpec
diff --git a/src/test/Data/MonoidMap/PartitionSpec.hs b/src/test/Data/MonoidMap/PartitionSpec.hs
index b749e5b0..7d98d52b 100644
--- a/src/test/Data/MonoidMap/PartitionSpec.hs
+++ b/src/test/Data/MonoidMap/PartitionSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.PartitionSpec
diff --git a/src/test/Data/MonoidMap/PrefixSpec.hs b/src/test/Data/MonoidMap/PrefixSpec.hs
index eab9c24d..20b3e1a3 100644
--- a/src/test/Data/MonoidMap/PrefixSpec.hs
+++ b/src/test/Data/MonoidMap/PrefixSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.PrefixSpec
diff --git a/src/test/Data/MonoidMap/SingletonSpec.hs b/src/test/Data/MonoidMap/SingletonSpec.hs
index aaee5408..86db6812 100644
--- a/src/test/Data/MonoidMap/SingletonSpec.hs
+++ b/src/test/Data/MonoidMap/SingletonSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.SingletonSpec
diff --git a/src/test/Data/MonoidMap/SliceSpec.hs b/src/test/Data/MonoidMap/SliceSpec.hs
index b32a11ea..b0684dee 100644
--- a/src/test/Data/MonoidMap/SliceSpec.hs
+++ b/src/test/Data/MonoidMap/SliceSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.SliceSpec
diff --git a/src/test/Data/MonoidMap/SuffixSpec.hs b/src/test/Data/MonoidMap/SuffixSpec.hs
index 78012257..184d40a6 100644
--- a/src/test/Data/MonoidMap/SuffixSpec.hs
+++ b/src/test/Data/MonoidMap/SuffixSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.SuffixSpec
diff --git a/src/test/Data/MonoidMap/UnionSpec.hs b/src/test/Data/MonoidMap/UnionSpec.hs
index 6d66cefd..e6e88dfa 100644
--- a/src/test/Data/MonoidMap/UnionSpec.hs
+++ b/src/test/Data/MonoidMap/UnionSpec.hs
@@ -3,7 +3,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.UnionSpec
diff --git a/src/test/Data/MonoidMap/ValiditySpec.hs b/src/test/Data/MonoidMap/ValiditySpec.hs
index d897d98b..3488da15 100644
--- a/src/test/Data/MonoidMap/ValiditySpec.hs
+++ b/src/test/Data/MonoidMap/ValiditySpec.hs
@@ -2,7 +2,7 @@
 {-# LANGUAGE RankNTypes #-}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Data.MonoidMap.ValiditySpec
diff --git a/src/test/Examples/MultiMapSpec.hs b/src/test/Examples/MultiMapSpec.hs
index 77f44eee..1eda73f1 100644
--- a/src/test/Examples/MultiMapSpec.hs
+++ b/src/test/Examples/MultiMapSpec.hs
@@ -5,7 +5,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Examples.MultiMapSpec
diff --git a/src/test/Examples/RecoveredMapSpec.hs b/src/test/Examples/RecoveredMapSpec.hs
index 300c2edf..b71b0326 100644
--- a/src/test/Examples/RecoveredMapSpec.hs
+++ b/src/test/Examples/RecoveredMapSpec.hs
@@ -5,7 +5,7 @@
 {-# HLINT ignore "Use null" #-}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Examples.RecoveredMapSpec
diff --git a/src/test/Test/Common.hs b/src/test/Test/Common.hs
index 19caebc3..85de1040 100644
--- a/src/test/Test/Common.hs
+++ b/src/test/Test/Common.hs
@@ -5,7 +5,7 @@
 {- HLINT ignore "Use null" -}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Test.Common
diff --git a/src/test/Test/Hspec/Unit.hs b/src/test/Test/Hspec/Unit.hs
index 340870f8..d0b4e9e8 100644
--- a/src/test/Test/Hspec/Unit.hs
+++ b/src/test/Test/Hspec/Unit.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE FunctionalDependencies #-}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 module Test.Hspec.Unit where
diff --git a/src/test/Test/QuickCheck/Classes/Hspec.hs b/src/test/Test/QuickCheck/Classes/Hspec.hs
index 38f4f3db..cdd41759 100644
--- a/src/test/Test/QuickCheck/Classes/Hspec.hs
+++ b/src/test/Test/QuickCheck/Classes/Hspec.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE PolyKinds #-}
 
 -- |
--- Copyright: © 2022–2023 Jonathan Knowles
+-- Copyright: © 2022–2024 Jonathan Knowles
 -- License: Apache-2.0
 --
 -- Provides testing functions to check that type class instances obey laws.