diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index 0e01f46..34ec64d 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -28,6 +28,11 @@ jobs:
     strategy:
       matrix:
         include:
+          - compiler: ghc-9.8.1
+            compilerKind: ghc
+            compilerVersion: 9.8.1
+            setup-method: ghcup
+            allow-failure: false
           - compiler: ghc-9.6.2
             compilerKind: ghc
             compilerVersion: 9.6.2
diff --git a/cached-io.cabal b/cached-io.cabal
index 0680fdb..b27a29d 100644
--- a/cached-io.cabal
+++ b/cached-io.cabal
@@ -12,7 +12,7 @@ author:             SumAll, Inc.
 maintainer:         Bellroy Tech Team <haskell@bellroy.com>
 category:           Development
 build-type:         Simple
-tested-with:        GHC ==8.8.4 || ==8.10.7 || ==9.0.2 || ==9.2.4 || ==9.4.5 || ==9.6.2
+tested-with:        GHC ==8.8.4 || ==8.10.7 || ==9.0.2 || ==9.2.4 || ==9.4.5 || ==9.6.2 || ==9.8.1
 extra-source-files:
   CHANGELOG.md
   README.md
diff --git a/flake.nix b/flake.nix
index f48489d..77252d4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,6 +21,7 @@
           "ghc92"
           "ghc94"
           "ghc96"
+          "ghc98"
         ];
 
         packages = builtins.listToAttrs (