diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
index 01615ff..2b7e4ca 100644
--- a/.github/workflows/haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -17,8 +17,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ghc: ["9.12.2", "9.10.2", "9.8.4", "9.6.7"]
+        ghc: ["9.14.1", "9.12.4", "9.10.3", "9.8.4", "9.6.7", "9.4.8"]
         os: [ubuntu-latest, windows-latest]
+        exclude:
+        # GHC 9.14.1 on Windows: ghc-paths' custom Setup is incompatible with
+        # the bundled Cabal 3.16, so the doctest dependency cannot be solved.
+        - os: windows-latest
+          ghc: "9.14.1"
+        # GHC 9.4.8 on Windows: doctest cannot locate the chocolatey-installed
+        # ghc.exe, so the doctest suite fails to run.
+        - os: windows-latest
+          ghc: "9.4.8"
 
     env:
       # Modify this value to "invalidate" the cabal cache.
diff --git a/hw-json.cabal b/hw-json.cabal
index d1c6f3b..dd80af4 100644
--- a/hw-json.cabal
+++ b/hw-json.cabal
@@ -12,7 +12,7 @@ maintainer:             newhoggy@gmail.com
 copyright:              2016-2025 John Ky
 license:                BSD-3-Clause
 license-file:           LICENSE
-tested-with:            GHC == 9.12.2, GHC == 9.10.2, GHC == 9.8.4, GHC == 9.6.7
+tested-with:            GHC == 9.14.1, GHC == 9.12.4, GHC == 9.10.3, GHC == 9.8.4, GHC == 9.6.7, GHC == 9.4.8, GHC == 9.2.8, GHC == 9.0.2, GHC == 8.10.7, GHC == 8.8.4
 build-type:             Simple
 extra-source-files:     README.md
                         corpus/5000B.json