diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index 2e34bea..a03c595 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -8,9 +8,9 @@
 #
 # For more information, see https://github.com/haskell-CI/haskell-ci
 #
-# version: 0.19.20241223
+# version: 0.19.20250917
 #
-# REGENDATA ("0.19.20241223",["github","HTTP.cabal"])
+# REGENDATA ("0.19.20250917",["github","HTTP.cabal"])
 #
 name: Haskell-CI
 on:
@@ -20,10 +20,13 @@ on:
   pull_request:
     branches:
       - master
+  merge_group:
+    branches:
+      - master
 jobs:
   linux:
     name: Haskell-CI - Linux - ${{ matrix.compiler }}
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     timeout-minutes:
       60
     container:
@@ -32,14 +35,14 @@ jobs:
     strategy:
       matrix:
         include:
-          - compiler: ghc-9.12.1
+          - compiler: ghc-9.12.2
             compilerKind: ghc
-            compilerVersion: 9.12.1
+            compilerVersion: 9.12.2
             setup-method: ghcup
             allow-failure: false
-          - compiler: ghc-9.10.1
+          - compiler: ghc-9.10.3
             compilerKind: ghc
-            compilerVersion: 9.10.1
+            compilerVersion: 9.10.3
             setup-method: ghcup
             allow-failure: false
           - compiler: ghc-9.8.4
@@ -47,9 +50,9 @@ jobs:
             compilerVersion: 9.8.4
             setup-method: ghcup
             allow-failure: false
-          - compiler: ghc-9.6.6
+          - compiler: ghc-9.6.7
             compilerKind: ghc
-            compilerVersion: 9.6.6
+            compilerVersion: 9.6.7
             setup-method: ghcup
             allow-failure: false
           - compiler: ghc-9.4.8
@@ -101,12 +104,12 @@ jobs:
       - name: Install GHCup
         run: |
           mkdir -p "$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 "$HOME/.ghcup/bin/ghcup"
       - name: Install cabal-install
         run: |
-          "$HOME/.ghcup/bin/ghcup" install cabal 3.14.1.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
-          echo "CABAL=$HOME/.ghcup/bin/cabal-3.14.1.0 -vnormal+nowrap" >> "$GITHUB_ENV"
+          "$HOME/.ghcup/bin/ghcup" install cabal 3.16.0.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
+          echo "CABAL=$HOME/.ghcup/bin/cabal-3.16.0.0 -vnormal+nowrap" >> "$GITHUB_ENV"
       - name: Install GHC (GHCup)
         if: matrix.setup-method == 'ghcup'
         run: |
@@ -182,7 +185,7 @@ 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
@@ -207,7 +210,9 @@ jobs:
           touch cabal.project.local
           echo "packages: ${PKGDIR_HTTP}" >> cabal.project
           echo "package HTTP" >> cabal.project
-          echo "    ghc-options: -Werror=missing-methods" >> cabal.project
+          echo "    ghc-options: -Werror=missing-methods -Werror=missing-fields" >> cabal.project
+          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then echo "package HTTP" >> cabal.project ; fi
+          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then echo "    ghc-options: -Werror=incomplete-patterns -Werror=incomplete-uni-patterns" >> cabal.project ; fi
           cat >> cabal.project <<EOF
           EOF
           $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: any.$_ installed\n" unless /^(HTTP)$/; }' >> cabal.project.local
diff --git a/HTTP.cabal b/HTTP.cabal
index 046661a..da12d4d 100644
--- a/HTTP.cabal
+++ b/HTTP.cabal
@@ -58,10 +58,10 @@ Description:
 Extra-Source-Files: CHANGES
 
 tested-with:
-  GHC == 9.12.1
-  GHC == 9.10.1
+  GHC == 9.12.2
+  GHC == 9.10.3
   GHC == 9.8.4
-  GHC == 9.6.6
+  GHC == 9.6.7
   GHC == 9.4.8
   GHC == 9.2.8
   GHC == 9.0.2
diff --git a/cabal.haskell-ci b/cabal.haskell-ci
index e1f1b77..051747d 100644
--- a/cabal.haskell-ci
+++ b/cabal.haskell-ci
@@ -1 +1,2 @@
 branches: master
+error-unused-packages: False