diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright 2009–2013 Roel van Dijk
+Copyright 2009–2020 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:       0.3.1.1
-cabal-version: >=1.6
+version:       0.3.1.2
+cabal-version: >=1.10
 build-type:    Simple
 stability:     provisional
-author:        Roel van Dijk <vandijk.roel@gmail.com>
-maintainer:    Roel van Dijk <vandijk.roel@gmail.com>
-copyright:     2009—2013 Roel van Dijk <vandijk.roel@gmail.com>
+author:        Roel van Dijk <roel@lambdeacube.nl>
+maintainer:    Roel van Dijk <roel@lambdeacube.nl>
+copyright:     2009—2020 Roel van Dijk <roel@lambdeacube.nl>
 license:       BSD3
 license-file:  LICENSE
 category:
@@ -31,11 +31,15 @@
   default: False
 
 library
+  default-language: Haskell2010
+
   exposed-modules: Data.IntMap.Unicode
                  , Data.IntSet.Unicode
                  , Data.Map.Unicode
                  , Data.Sequence.Unicode
                  , Data.Set.Unicode
+                 , Data.IntMap.Lazy.Unicode
+                 , Data.Map.Lazy.Unicode
   build-depends: base                 >= 3.0.3.1 && < 5
                , base-unicode-symbols >= 0.1.1   && < 0.3
 
@@ -43,10 +47,8 @@
     build-depends: containers >= 0.4 && < 0.5
     cpp-options: -DCONTAINERS_OLD
   else
-    build-depends: containers >= 0.5 && < 0.6
-    exposed-modules: Data.IntMap.Lazy.Unicode
-                   , Data.IntMap.Strict.Unicode
-                   , Data.Map.Lazy.Unicode
+    build-depends: containers >= 0.5 && < 0.6.3
+    exposed-modules: Data.IntMap.Strict.Unicode
                    , Data.Map.Strict.Unicode
 
   ghc-options: -Wall