diff --git a/ASCII/QuasiQuoters.hs b/ASCII/QuasiQuoters.hs
--- a/ASCII/QuasiQuoters.hs
+++ b/ASCII/QuasiQuoters.hs
@@ -29,7 +29,7 @@
 
 {- | Produces an expression or a pattern corresponding to an ASCII character.
 
-The result will have an 'ASCII.Superset.IsChar' constraint; since this is polymorphic, use with a type signature to specify the particular you want is recommended.
+The result will have an 'ASCII.Superset.CharSuperset' constraint; since this is polymorphic, use with a type signature to specify the particular you want is recommended.
 
 The quasi-quoted string must consist of a single character that is within the ASCII character set.
 
@@ -55,7 +55,7 @@
 
 {- | Produces an expression or a pattern corresponding to an ASCII string.
 
-The result will have an 'ASCII.Superset.IsString' constraint; since this is polymorphic, use with a type signature to specify the particular you want is recommended.
+The result will have an 'ASCII.Superset.StringSuperset' constraint; since this is polymorphic, use with a type signature to specify the particular you want is recommended.
 
 The quasi-quoted string must consist only of characters are within the ASCII character set.
 
diff --git a/ascii-th.cabal b/ascii-th.cabal
--- a/ascii-th.cabal
+++ b/ascii-th.cabal
@@ -1,7 +1,7 @@
 cabal-version: 2.0
 
 name: ascii-th
-version: 1.0.0.2
+version: 1.0.0.4
 synopsis: Template Haskell support for ASCII
 category: Data, Text
 
@@ -18,7 +18,7 @@
 
 build-type: Simple
 
-tested-with: GHC == 8.10.1, GHC == 8.8.1, GHC == 8.6.5, GHC == 8.4.3
+tested-with: GHC == 9.0.1, GHC == 8.10.1, GHC == 8.8.1, GHC == 8.6.5, GHC == 8.4.3
 
 extra-source-files: changelog.txt
 
@@ -34,10 +34,11 @@
     default-extensions: ViewPatterns
     ghc-options: -Wall
 
-    build-depends: ascii-char       >= 1.0  && < 1.1
-    build-depends: ascii-superset   >= 1.0  && < 1.1
-    build-depends: base             >= 4.11 && < 4.15
-    build-depends: template-haskell >= 2.13 && < 2.17
+    build-depends: ascii-char       ^>= 1.0
+    build-depends: ascii-superset   ^>= 1.0
+
+    build-depends: base             >= 4.11 && < 4.16
+    build-depends: template-haskell >= 2.13 && < 2.18
 
     exposed-modules: ASCII.TemplateHaskell
     exposed-modules: ASCII.QuasiQuoters
diff --git a/changelog.txt b/changelog.txt
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,2 +1,3 @@
 1.0.0.0 - 2020-05-05 - Initial release
 1.0.0.2 - 2020-05-18 - Support GHC 8.10
+1.0.0.4 - 2021-02-10 - Support GHC 9.0
diff --git a/license.txt b/license.txt
--- a/license.txt
+++ b/license.txt
@@ -1,4 +1,4 @@
-Copyright 2020 Typeclass Consulting LLC
+Copyright 2021 Mission Valley Software LLC
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.