diff --git a/.github/workflows/haskell-ci-hackage.patch b/.github/workflows/haskell-ci-hackage.patch
index 105f75b9d..683f3ac88 100644
--- a/.github/workflows/haskell-ci-hackage.patch
+++ b/.github/workflows/haskell-ci-hackage.patch
@@ -38,7 +38,7 @@ set in GitHub repository secrets.
    linux:
      name: Haskell-CI - Linux - ${{ matrix.compiler }}
 @@ -33,6 +40,7 @@
-             compilerVersion: 9.8.2
+             compilerVersion: 9.8.4
              setup-method: ghcup
              allow-failure: false
 +            upload: true
diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index d063928b0..113857c19 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -35,14 +35,19 @@ jobs:
     strategy:
       matrix:
         include:
+          - compiler: ghc-9.12.1
+            compilerKind: ghc
+            compilerVersion: 9.12.1
+            setup-method: ghcup
+            allow-failure: false
           - compiler: ghc-9.10.1
             compilerKind: ghc
             compilerVersion: 9.10.1
             setup-method: ghcup
             allow-failure: false
-          - compiler: ghc-9.8.2
+          - compiler: ghc-9.8.4
             compilerKind: ghc
-            compilerVersion: 9.8.2
+            compilerVersion: 9.8.4
             setup-method: ghcup
             allow-failure: false
             upload: true
diff --git a/xmonad-contrib.cabal b/xmonad-contrib.cabal
index 66dbe10c4..737366202 100644
--- a/xmonad-contrib.cabal
+++ b/xmonad-contrib.cabal
@@ -38,7 +38,7 @@ cabal-version:      1.12
 build-type:         Simple
 bug-reports:        https://github.com/xmonad/xmonad-contrib/issues
 
-tested-with:        GHC == 8.8.4 || == 8.10.7 || == 9.0.2 || == 9.2.8 || == 9.4.8 || == 9.6.6 || == 9.8.2 || == 9.10.1
+tested-with:        GHC == 8.8.4 || == 8.10.7 || == 9.0.2 || == 9.2.8 || == 9.4.8 || == 9.6.6 || == 9.8.4 || == 9.10.1 || == 9.12.1
 
 source-repository head
   type:     git