diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index d47f63ac..2ab7d724 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -32,6 +32,11 @@ jobs:
     strategy:
       matrix:
         include:
+          - compiler: ghc-9.6.5
+            compilerKind: ghc
+            compilerVersion: 9.6.5
+            setup-method: ghcup
+            allow-failure: false
           - compiler: ghc-9.4.8
             compilerKind: ghc
             compilerVersion: 9.4.8
diff --git a/cabal2nix/cabal2nix.cabal b/cabal2nix/cabal2nix.cabal
index 2c926f22..4f03d3e8 100644
--- a/cabal2nix/cabal2nix.cabal
+++ b/cabal2nix/cabal2nix.cabal
@@ -12,7 +12,7 @@ author:             Peter Simons <simons@cryp.to>
 -- list all contributors: git log --pretty='%an' | sort | uniq
 maintainer:         sternenseemann <sternenseemann@systemli.org>
 stability:          stable
-tested-with:        GHC == 8.10.7 || == 9.0.2 || == 9.2.8 || == 9.4.8
+tested-with:        GHC == 8.10.7 || == 9.0.2 || == 9.2.8 || == 9.4.8 || == 9.6.5
 category:           Distribution, Nix
 homepage:           https://github.com/nixos/cabal2nix#readme
 bug-reports:        https://github.com/nixos/cabal2nix/issues
diff --git a/distribution-nixpkgs/distribution-nixpkgs.cabal b/distribution-nixpkgs/distribution-nixpkgs.cabal
index 93950146..bf432024 100644
--- a/distribution-nixpkgs/distribution-nixpkgs.cabal
+++ b/distribution-nixpkgs/distribution-nixpkgs.cabal
@@ -6,7 +6,7 @@ license:       BSD3
 license-file:  LICENSE
 author:        Peter Simons <simons@cryp.to>
 maintainer:    sternenseemann <sternenseemann@systemli.org>
-tested-with:   GHC == 8.10.7 || == 9.0.2 || == 9.2.8 || == 9.4.8
+tested-with:   GHC == 8.10.7 || == 9.0.2 || == 9.2.8 || == 9.4.8 || == 9.6.5
 category:      Distribution, Nix
 homepage:      https://github.com/NixOS/cabal2nix/tree/master/distribution-nixpkgs#readme
 bug-reports:   https://github.com/NixOS/cabal2nix/issues
diff --git a/hackage-db/hackage-db.cabal b/hackage-db/hackage-db.cabal
index f07c8be5..b4814f7e 100644
--- a/hackage-db/hackage-db.cabal
+++ b/hackage-db/hackage-db.cabal
@@ -9,7 +9,7 @@ license:       BSD3
 license-file:  LICENSE
 author:        Peter Simons, Alexander Altman, Ben James, Kevin Quick
 maintainer:    sternenseemann <sternenseemann@systemli.org>
-tested-with:   GHC == 8.10.7 || == 9.0.2 || == 9.2.8 || == 9.4.8
+tested-with:   GHC == 8.10.7 || == 9.0.2 || == 9.2.8 || == 9.4.8 || == 9.6.5
 category:      Distribution
 homepage:      https://github.com/NixOS/cabal2nix/tree/master/hackage-db#readme
 bug-reports:   https://github.com/NixOS/cabal2nix/issues
diff --git a/language-nix/language-nix.cabal b/language-nix/language-nix.cabal
index 9c587539..63f6135f 100644
--- a/language-nix/language-nix.cabal
+++ b/language-nix/language-nix.cabal
@@ -7,7 +7,7 @@ license:       BSD3
 license-file:  LICENSE
 author:        Peter Simons
 maintainer:    simons@cryp.to
-tested-with:   GHC == 8.10.7, GHC == 9.0.2, GHC == 9.2.8, GHC == 9.4.8
+tested-with:   GHC == 8.10.7, GHC == 9.0.2, GHC == 9.2.8, GHC == 9.4.8, GHC == 9.6.5
 category:      Distribution, Language, Nix
 homepage:      https://github.com/NixOS/cabal2nix/tree/master/language-nix#readme
 bug-reports:   https://github.com/NixOS/cabal2nix/issues