diff --git a/changelog.txt b/changelog.txt
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,3 +1,5 @@
 1.0.0.2 - 2020-05-18 - Support GHC 8.10
 
 1.0.0.4 - 2021-02-09 - Support bytestring-0.11
+
+1.0.0.6 - 2021-02-10 - Support GHC 9.0
diff --git a/data-ascii.cabal b/data-ascii.cabal
--- a/data-ascii.cabal
+++ b/data-ascii.cabal
@@ -1,7 +1,7 @@
 cabal-version: 2.0
 
 Name:                data-ascii
-Version:             1.0.0.4
+Version:             1.0.0.6
 Synopsis:            Type-safe, bytestring-based ASCII values
 Description:         Type-safe, bytestring-based ASCII values.
 License:             BSD3
@@ -13,7 +13,7 @@
 Homepage:            https://github.com/typeclasses/ascii
 Bug-Reports:         https://github.com/typeclasses/ascii/issues
 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
 
 Source-Repository head