diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index 2341e1d..7995947 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: 0.19.20250605
+# version: 0.19.20250916
 #
-# REGENDATA ("0.19.20250605",["github","cabal.project"])
+# REGENDATA ("0.19.20250916",["github","cabal.project"])
 #
 name: Haskell-CI
 on:
@@ -96,8 +96,8 @@ jobs:
           chmod a+x "$HOME/.ghcup/bin/ghcup"
       - name: Install cabal-install
         run: |
-          "$HOME/.ghcup/bin/ghcup" install cabal 3.14.2.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
-          echo "CABAL=$HOME/.ghcup/bin/cabal-3.14.2.0 -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 +182,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-docspec
           cabal-docspec --version
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -207,11 +207,12 @@ jobs:
           touch cabal.project.local
           echo "packages: ${PKGDIR_splitmix}" >> cabal.project
           echo "package splitmix" >> 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 splitmix" >> cabal.project ; fi
+          if [ $((HCNUMVER >= 90400)) -ne 0 ] ; then echo "    ghc-options: -Werror=unused-packages" >> cabal.project ; fi
+          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then echo "package splitmix" >> 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
-          allow-newer: async-2.2.5:base
-          allow-newer: hashable-1.4.4.0:base
-          allow-newer: hashable-1.4.4.0:containers
           EOF
           $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: any.$_ installed\n" unless /^(splitmix)$/; }' >> cabal.project.local
           cat cabal.project
diff --git a/cabal.project b/cabal.project
index c7e29bd..0f166c7 100644
--- a/cabal.project
+++ b/cabal.project
@@ -1,7 +1,3 @@
 packages: .
 
 tests: True
-
-allow-newer: async-2.2.5:base
-allow-newer: hashable-1.4.4.0:base
-allow-newer: hashable-1.4.4.0:containers
diff --git a/splitmix.cabal b/splitmix.cabal
index f64a8f0..6c198b4 100644
--- a/splitmix.cabal
+++ b/splitmix.cabal
@@ -208,7 +208,6 @@ test-suite splitmix-dieharder
     , bytestring  >=0.10.8.2 && <0.13
     , deepseq
     , process     >=1.6.0.0  && <1.7
-    , random
     , splitmix
     , tf-random   >=0.5      && <0.6
     , vector      >=0.13.0.0 && <0.14