diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright 2009–2020 Roel van Dijk
+Copyright 2009–2021 Roel van Dijk
 
 All rights reserved.
 
diff --git a/containers-unicode-symbols.cabal b/containers-unicode-symbols.cabal
--- a/containers-unicode-symbols.cabal
+++ b/containers-unicode-symbols.cabal
@@ -1,11 +1,11 @@
 name:          containers-unicode-symbols
-version:       0.3.1.2
+version:       0.3.1.3
 cabal-version: >=1.10
 build-type:    Simple
 stability:     provisional
 author:        Roel van Dijk <roel@lambdeacube.nl>
 maintainer:    Roel van Dijk <roel@lambdeacube.nl>
-copyright:     2009—2020 Roel van Dijk <roel@lambdeacube.nl>
+copyright:     2009—2021 Roel van Dijk <roel@lambdeacube.nl>
 license:       BSD3
 license-file:  LICENSE
 category:
@@ -47,7 +47,7 @@
     build-depends: containers >= 0.4 && < 0.5
     cpp-options: -DCONTAINERS_OLD
   else
-    build-depends: containers >= 0.5 && < 0.6.3
+    build-depends: containers >= 0.5 && < 0.6.5
     exposed-modules: Data.IntMap.Strict.Unicode
                    , Data.Map.Strict.Unicode