diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index f40471b..7f305f8 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -8,14 +8,15 @@
 #
 # For more information, see https://github.com/haskell-CI/haskell-ci
 #
-# version: 0.19.20250216
+# version: 0.19.20251118
 #
-# REGENDATA ("0.19.20250216",["github","th-deepstrict.cabal"])
+# REGENDATA ("0.19.20251118",["github","th-deepstrict.cabal"])
 #
 name: Haskell-CI
 on:
   - push
   - pull_request
+  - merge_group
 jobs:
   linux:
     name: Haskell-CI - Linux - ${{ matrix.compiler }}
@@ -28,9 +29,19 @@ jobs:
     strategy:
       matrix:
         include:
-          - compiler: ghc-9.12.1
+          - compiler: ghc-9.14.0.20251104
             compilerKind: ghc
-            compilerVersion: 9.12.1
+            compilerVersion: 9.14.0.20251104
+            setup-method: ghcup-prerelease
+            allow-failure: false
+          - compiler: ghc-9.12.2
+            compilerKind: ghc
+            compilerVersion: 9.12.2
+            setup-method: ghcup
+            allow-failure: false
+          - compiler: ghc-9.10.3
+            compilerKind: ghc
+            compilerVersion: 9.10.3
             setup-method: ghcup
             allow-failure: false
           - compiler: ghc-9.8.4
@@ -38,9 +49,9 @@ jobs:
             compilerVersion: 9.8.4
             setup-method: ghcup
             allow-failure: false
-          - compiler: ghc-9.6.4
+          - compiler: ghc-9.6.7
             compilerKind: ghc
-            compilerVersion: 9.6.4
+            compilerVersion: 9.6.7
             setup-method: ghcup
             allow-failure: false
           - compiler: ghc-9.4.8
@@ -62,7 +73,7 @@ jobs:
       - name: Install GHCup
         run: |
           mkdir -p "$HOME/.ghcup/bin"
-          curl -sL https://downloads.haskell.org/ghcup/0.1.30.0/x86_64-linux-ghcup-0.1.30.0 > "$HOME/.ghcup/bin/ghcup"
+          curl -sL https://downloads.haskell.org/ghcup/0.1.50.1/x86_64-linux-ghcup-0.1.50.1 > "$HOME/.ghcup/bin/ghcup"
           chmod a+x "$HOME/.ghcup/bin/ghcup"
       - name: Install cabal-install
         run: |
@@ -82,6 +93,21 @@ jobs:
           HCKIND: ${{ matrix.compilerKind }}
           HCNAME: ${{ matrix.compiler }}
           HCVER: ${{ matrix.compilerVersion }}
+      - name: Install GHC (GHCup prerelease)
+        if: matrix.setup-method == 'ghcup-prerelease'
+        run: |
+          "$HOME/.ghcup/bin/ghcup" config add-release-channel prereleases
+          "$HOME/.ghcup/bin/ghcup" install ghc "$HCVER" || (cat "$HOME"/.ghcup/logs/*.* && false)
+          HC=$("$HOME/.ghcup/bin/ghcup" whereis ghc "$HCVER")
+          HCPKG=$(echo "$HC" | sed 's#ghc$#ghc-pkg#')
+          HADDOCK=$(echo "$HC" | sed 's#ghc$#haddock#')
+          echo "HC=$HC" >> "$GITHUB_ENV"
+          echo "HCPKG=$HCPKG" >> "$GITHUB_ENV"
+          echo "HADDOCK=$HADDOCK" >> "$GITHUB_ENV"
+        env:
+          HCKIND: ${{ matrix.compilerKind }}
+          HCNAME: ${{ matrix.compiler }}
+          HCVER: ${{ matrix.compilerVersion }}
       - name: Set PATH and environment variables
         run: |
           echo "$HOME/.cabal/bin" >> $GITHUB_PATH
@@ -92,7 +118,7 @@ jobs:
           echo "HCNUMVER=$HCNUMVER" >> "$GITHUB_ENV"
           echo "ARG_TESTS=--enable-tests" >> "$GITHUB_ENV"
           echo "ARG_BENCH=--enable-benchmarks" >> "$GITHUB_ENV"
-          echo "HEADHACKAGE=false" >> "$GITHUB_ENV"
+          if [ $((HCNUMVER >= 91400)) -ne 0 ] ; then echo "HEADHACKAGE=true" >> "$GITHUB_ENV" ; else echo "HEADHACKAGE=false" >> "$GITHUB_ENV" ; fi
           echo "ARG_COMPILER=--$HCKIND --with-compiler=$HC" >> "$GITHUB_ENV"
         env:
           HCKIND: ${{ matrix.compilerKind }}
@@ -120,6 +146,18 @@ jobs:
           repository hackage.haskell.org
             url: http://hackage.haskell.org/
           EOF
+          if $HEADHACKAGE; then
+          cat >> $CABAL_CONFIG <<EOF
+          repository head.hackage.ghc.haskell.org
+             url: https://ghc.gitlab.haskell.org/head.hackage/
+             secure: True
+             root-keys: 7541f32a4ccca4f97aea3b22f5e593ba2c0267546016b992dfadcd2fe944e55d
+                        26021a13b401500c8eb2761ca95c61f2d625bfef951b939a8124ed12ecf07329
+                        f76d08be13e9a61a377a85e2fb63f4c5435d40f8feb3e12eb05905edb8cdea89
+             key-threshold: 3
+          active-repositories: hackage.haskell.org, head.hackage.ghc.haskell.org:override
+          EOF
+          fi
           cat >> $CABAL_CONFIG <<EOF
           program-default-options
             ghc-options: $GHCJOBS +RTS -M3G -RTS
@@ -143,7 +181,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -168,9 +206,16 @@ jobs:
           touch cabal.project.local
           echo "packages: ${PKGDIR_th_deepstrict}" >> cabal.project
           echo "package th-deepstrict" >> cabal.project
-          echo "    ghc-options: -Werror=missing-methods" >> cabal.project
+          echo "    ghc-options: -Werror=missing-methods -Werror=missing-fields" >> cabal.project
+          if [ $((HCNUMVER >= 90400)) -ne 0 ] ; then echo "package th-deepstrict" >> cabal.project ; fi
+          if [ $((HCNUMVER >= 90400)) -ne 0 ] ; then echo "    ghc-options: -Werror=unused-packages" >> cabal.project ; fi
+          echo "package th-deepstrict" >> cabal.project
+          echo "    ghc-options: -Werror=incomplete-patterns -Werror=incomplete-uni-patterns" >> cabal.project
           cat >> cabal.project <<EOF
           EOF
+          if $HEADHACKAGE; then
+          echo "allow-newer: $($HCPKG list --simple-output | sed -E 's/([a-zA-Z-]+)-[0-9.]+/*:\1,/g')" >> cabal.project
+          fi
           $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: any.$_ installed\n" unless /^(th-deepstrict)$/; }' >> cabal.project.local
           cat cabal.project
           cat cabal.project.local
diff --git a/th-deepstrict.cabal b/th-deepstrict.cabal
index a677cb2..e8a6f3a 100644
--- a/th-deepstrict.cabal
+++ b/th-deepstrict.cabal
@@ -24,10 +24,11 @@ extra-doc-files:
 tested-with: 
   GHC ==9.2.8 
    || ==9.4.8 
-   || ==9.6.4 
+   || ==9.6.7
    || ==9.8.4
-   || ==9.10.2
-   || ==9.12.1
+   || ==9.10.3
+   || ==9.12.2
+   || ==9.14.1
 
 library
   default-language: Haskell2010
@@ -36,10 +37,10 @@ library
   exposed-modules:  Language.Haskell.TH.DeepStrict
   ghc-options:      -Wall -Wunused-packages
   build-depends:
-    , base              >=4.16.0  && <4.22
+    , base              >=4.16.0  && <4.23
     , containers        >=0.6.0   && <0.9
     , mtl               >=2.2     && <2.4
-    , template-haskell  >=2.18.0  && <2.24
+    , template-haskell  >=2.18.0  && <2.25
     , th-abstraction    >=0.7.0   && <0.8
     , th-orphans        >=0.13.14 && <0.14