diff --git a/.github/workflows/presubmit-cabal.yaml b/.github/workflows/presubmit-cabal.yaml
index b134548c5..ae4d8c9de 100644
--- a/.github/workflows/presubmit-cabal.yaml
+++ b/.github/workflows/presubmit-cabal.yaml
@@ -17,7 +17,7 @@ jobs:
       fail-fast: false # don't cancel other jobs if one fails
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        ghc: [8.10.7, 9.0.2, 9.2.7, 9.4.5, 9.6.1]
+        ghc: [8.10.7, 9.0.2, 9.2.8, 9.4.7, 9.6.3]
     defaults:
       run:
         # The default shell on Windows is `pwsh`. However, it doesn't expand
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 6800df191..3b68bb60f 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -15,7 +15,7 @@ jobs:
     # are not building a new cache here, just reusing an existing one.
     env:
       os: ubuntu-latest
-      ghc: 9.4.4
+      ghc: 9.6.3
     outputs:
       hash_sdist: ${{ steps.hash_sdist.outputs.hash_sdist }}
       hash_execs: ${{ steps.hash_execs.outputs.hash_execs }}