diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,11 +1,13 @@
+0.2.5.3 (2021.11.02):
+    - Increasing upper bounds for GHC 9.2.1
 0.2.5.2 (2021.10.16):
     - Increasing upper bounds to Hackage latest, instead of just GHC 9.0.1
 0.2.5.1 (2021.10.16):
     - Fixing things to compile under GHC 9.0.1
 0.2.5.0 (2019.02.25):
     - Fixing things to compile under GHC 8.4 and 8.6.
-	- Adds Semigroup (Trie a) instance
-	- Removed the obsolete/unused "useCinternal" Cabal flag
+    - Adds Semigroup (Trie a) instance
+    - Removed the obsolete/unused "useCinternal" Cabal flag
 0.2.4.3 (2019.02.24):
     - Moved VERSION to CHANGELOG
     - Fixing things to compile under GHC 8.0 and 8.2.  N.B., still doesn't compile under 8.4 or 8.6, due to the version limit on `base`.
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -25,24 +25,9 @@
 ## Install
 
 This is a simple package and should be easy to install.  You should
-be able to use one of the following standard methods to install it.
+be able to use the standard:
 
-    -- With cabal-install and without the source:
     $> cabal install bytestring-trie
-    
-    -- With cabal-install and with the source already:
-    $> cd bytestring-trie
-    $> cabal install
-    
-    -- Without cabal-install, but with the source already:
-    $> cd bytestring-trie
-    $> runhaskell Setup.hs configure --user
-    $> runhaskell Setup.hs build
-    $> runhaskell Setup.hs haddock --hyperlink-source
-    $> runhaskell Setup.hs copy
-    $> runhaskell Setup.hs register
-
-The Haddock step is optional.
 
 
 ## Portability
diff --git a/bytestring-trie.cabal b/bytestring-trie.cabal
--- a/bytestring-trie.cabal
+++ b/bytestring-trie.cabal
@@ -1,18 +1,19 @@
-------------------------------------------------------------
--- wren gayle romano <wren@cpan.org>            ~ 2021.10.16
-------------------------------------------------------------
+----------------------------------------------------------------
+-- wren gayle romano <wren@cpan.org>                ~ 2021.11.02
+----------------------------------------------------------------
 
 -- Cabal >=1.10 is required by Hackage.
 Cabal-Version:  >= 1.10
 Build-Type:     Simple
 
 Name:           bytestring-trie
-Version:        0.2.5.2
+Version:        0.2.5.3
 Stability:      provisional
-Homepage:       http://wrengr.org
+Homepage:       https://wrengr.org/software/hackage.html
+Bug-Reports:    https://github.com/wrengr/bytestring-trie/issues
 Author:         wren gayle romano
 Maintainer:     wren@cpan.org
-Copyright:      Copyright (c) 2008--2021 wren gayle romano
+Copyright:      Copyright (c) 2008–2021 wren gayle romano
 License:        BSD3
 License-File:   LICENSE
 
@@ -39,12 +40,11 @@
                 contextual mapping, extracting the minimum and
                 maximum keys, etc.)
 
-
 Extra-source-files:
     AUTHORS, CHANGELOG, README.md
 
 -- This should work as far back as GHC 7.4.1, but we don't verify that by CI.
--- TODO: add the github-actions link.
+-- <https://github.com/wrengr/bytestring-trie/actions?query=workflow%3Aci>
 Tested-With:
     GHC ==8.0.2,
     GHC ==8.2.2,
@@ -52,13 +52,14 @@
     GHC ==8.6.5,
     GHC ==8.8.4,
     GHC ==8.10.3,
-    GHC ==9.0.1
+    GHC ==9.0.1,
+    GHC ==9.2.1
 
 Source-Repository head
     Type:     git
     Location: https://github.com/wrengr/bytestring-trie.git
 
-------------------------------------------------------------
+----------------------------------------------------------------
 Library
     Default-Language: Haskell2010
     Hs-Source-Dirs:  src
@@ -71,9 +72,9 @@
     -- The lower bounds are more restrictive than necessary.
     -- But then, we don't maintain any CI tests for older
     -- versions, so these are the lowest bounds we've verified.
-    Build-Depends: base       >= 4.5   && < 4.16
+    Build-Depends: base       >= 4.5   && < 4.17
                  , bytestring >= 0.9.2 && < 0.12
                  , binary     >= 0.5.1 && < 0.11
     
-------------------------------------------------------------
-------------------------------------------------------- fin.
+----------------------------------------------------------------
+----------------------------------------------------------- fin.
diff --git a/src/Data/Trie.hs b/src/Data/Trie.hs
--- a/src/Data/Trie.hs
+++ b/src/Data/Trie.hs
@@ -2,12 +2,12 @@
 {-# OPTIONS_GHC -Wall -fwarn-tabs -fno-warn-unused-imports #-}
 {-# LANGUAGE NoImplicitPrelude #-}
 ----------------------------------------------------------------
---                                                  ~ 2014.10.09
+--                                                  ~ 2021.10.17
 -- |
 -- Module      :  Data.Trie
--- Copyright   :  Copyright (c) 2008--2015 wren gayle romano
+-- Copyright   :  Copyright (c) 2008--2021 wren gayle romano
 -- License     :  BSD3
--- Maintainer  :  wren@community.haskell.org
+-- Maintainer  :  wren@cpan.org
 -- Stability   :  experimental
 -- Portability :  portable
 --
diff --git a/src/Data/Trie/BitTwiddle.hs b/src/Data/Trie/BitTwiddle.hs
--- a/src/Data/Trie/BitTwiddle.hs
+++ b/src/Data/Trie/BitTwiddle.hs
@@ -4,12 +4,12 @@
 {-# LANGUAGE CPP, MagicHash #-}
 
 ----------------------------------------------------------------
---                                                  ~ 2009.01.05
+--                                                  ~ 2021.10.17
 -- |
 -- Module      :  Data.Trie.BitTwiddle
 -- Copyright   :  Copyright (c) 2002 Daan Leijen
 -- License     :  BSD3
--- Maintainer  :  libraries@haskell.org, wren@community.haskell.org
+-- Maintainer  :  libraries@haskell.org, wren@cpan.org
 -- Stability   :  stable
 -- Portability :  portable (with CPP)
 --
diff --git a/src/Data/Trie/ByteStringInternal.hs b/src/Data/Trie/ByteStringInternal.hs
--- a/src/Data/Trie/ByteStringInternal.hs
+++ b/src/Data/Trie/ByteStringInternal.hs
@@ -1,11 +1,11 @@
 {-# OPTIONS_GHC -Wall -fwarn-tabs #-}
 ------------------------------------------------------------
---                                              ~ 2019.02.25
+--                                              ~ 2021.10.17
 -- |
 -- Module      :  Data.Trie.ByteStringInternal
--- Copyright   :  Copyright (c) 2008--2019 wren gayle romano
+-- Copyright   :  Copyright (c) 2008--2021 wren gayle romano
 -- License     :  BSD3
--- Maintainer  :  wren@community.haskell.org
+-- Maintainer  :  wren@cpan.org
 -- Stability   :  experimental
 -- Portability :  GHC-only
 --
diff --git a/src/Data/Trie/Convenience.hs b/src/Data/Trie/Convenience.hs
--- a/src/Data/Trie/Convenience.hs
+++ b/src/Data/Trie/Convenience.hs
@@ -1,12 +1,12 @@
 {-# OPTIONS_GHC -Wall -fwarn-tabs #-}
 
 ----------------------------------------------------------------
---                                                  ~ 2011.02.12
+--                                                  ~ 2021.10.17
 -- |
 -- Module      :  Data.Trie.Convenience
--- Copyright   :  Copyright (c) 2008--2015 wren gayle romano
+-- Copyright   :  Copyright (c) 2008--2021 wren gayle romano
 -- License     :  BSD3
--- Maintainer  :  wren@community.haskell.org
+-- Maintainer  :  wren@cpan.org
 -- Stability   :  experimental
 -- Portability :  portable
 --
diff --git a/src/Data/Trie/Errors.hs b/src/Data/Trie/Errors.hs
--- a/src/Data/Trie/Errors.hs
+++ b/src/Data/Trie/Errors.hs
@@ -1,12 +1,12 @@
 {-# OPTIONS_GHC -Wall -fwarn-tabs #-}
 
 ----------------------------------------------------------------
---                                                  ~ 2011.02.12
+--                                                  ~ 2021.10.17
 -- |
 -- Module      :  Data.Trie.Errors
--- Copyright   :  Copyright (c) 2008--2015 wren gayle romano
+-- Copyright   :  Copyright (c) 2008--2021 wren gayle romano
 -- License     :  BSD3
--- Maintainer  :  wren@community.haskell.org
+-- Maintainer  :  wren@cpan.org
 -- Stability   :  experimental
 -- Portability :  portable
 --
diff --git a/src/Data/Trie/Internal.hs b/src/Data/Trie/Internal.hs
--- a/src/Data/Trie/Internal.hs
+++ b/src/Data/Trie/Internal.hs
@@ -6,10 +6,10 @@
 {-# LANGUAGE CPP #-}
 
 ------------------------------------------------------------
---                                              ~ 2019.02.24
+--                                              ~ 2021.10.17
 -- |
 -- Module      :  Data.Trie.Internal
--- Copyright   :  Copyright (c) 2008--2019 wren gayle romano
+-- Copyright   :  Copyright (c) 2008--2021 wren gayle romano
 -- License     :  BSD3
 -- Maintainer  :  wren@cpan.org
 -- Stability   :  provisional
