diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index 841be16..765f541 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: 0.19.20250115
 #
-# REGENDATA ("0.19.20241223",["github","cabal.project"])
+# REGENDATA ("0.19.20250115",["github","cabal.project"])
 #
 name: Haskell-CI
 on:
@@ -106,8 +106,8 @@ jobs:
           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 3.12.1.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
+          echo "CABAL=$HOME/.ghcup/bin/cabal-3.12.1.0 -vnormal+nowrap" >> "$GITHUB_ENV"
       - name: Install GHC (GHCup)
         if: matrix.setup-method == 'ghcup'
         run: |
@@ -222,15 +222,6 @@ jobs:
           if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then echo "package wiki-suite" >> cabal.project ; fi
           if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then echo "    ghc-options: -Werror=missing-methods" >> cabal.project ; fi
           cat >> cabal.project <<EOF
-          allow-newer: aeson:ghc-prim
-          allow-newer: aeson:template-haskell
-          allow-newer: indexed-traversable:base
-          allow-newer: indexed-traversable-instances:base
-          allow-newer: integer-conversion:base
-          allow-newer: semialign:base
-          allow-newer: these:base
-          allow-newer: uuid-types:template-haskell
-
           package blank-canvas-examples
             flags: +examples
           EOF
diff --git a/cabal.project b/cabal.project
index 2a4d882..3919e2e 100644
--- a/cabal.project
+++ b/cabal.project
@@ -4,14 +4,3 @@ packages: .
 
 package blank-canvas-examples
   flags: +examples
-
--- TODO: Remove this once the ecosystem has caught up with GHC 9.12
-allow-newer:
-  aeson:ghc-prim,
-  aeson:template-haskell,
-  indexed-traversable:base,
-  indexed-traversable-instances:base,
-  integer-conversion:base,
-  semialign:base,
-  these:base,
-  uuid-types:template-haskell