diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 19786174..0b42a8a6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-latest]
-        ghc: ['8.4', '8.6', '8.8', '8.10', '9.0', '9.2', '9.4', '9.6', '9.8', '9.10']
+        ghc: ['8.4', '8.6', '8.8', '8.10', '9.0', '9.2', '9.4', '9.6', '9.8', '9.10', '9.12']
         include:
         - os: macOS-latest
           ghc: 'latest'
diff --git a/bytestring.cabal b/bytestring.cabal
index c337c1ac..7079bcbb 100644
--- a/bytestring.cabal
+++ b/bytestring.cabal
@@ -57,9 +57,10 @@ Author:              Don Stewart,
 Maintainer:          Haskell Bytestring Team <andrew.lelechenko@gmail.com>, Core Libraries Committee
 Homepage:            https://github.com/haskell/bytestring
 Bug-reports:         https://github.com/haskell/bytestring/issues
-Tested-With:         GHC==9.10.1,
-                     GHC==9.8.2,
-                     GHC==9.6.5,
+Tested-With:         GHC==9.12.1,
+                     GHC==9.10.1,
+                     GHC==9.8.4,
+                     GHC==9.6.6,
                      GHC==9.4.8,
                      GHC==9.2.8,
                      GHC==9.0.2,