diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 585d7f3..c243442 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -9,15 +9,15 @@ on:
 
 jobs:
   audit:
-    container: buildenv:5
+    container: buildenv:6
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - run: hlint -- src tests
 
   test:
-    container: buildenv:5
+    container: buildenv:6
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install dependencies
         run: cabal update
       - name: Prepare system
@@ -25,9 +25,9 @@ jobs:
       - run: cabal test --test-show-details=streaming --enable-tests
 
   doc:
-    container: buildenv:5
+    container: buildenv:6
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install dependencies
         run: cabal update
       - run: cabal haddock --enable-documentation
diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index f6f905f..6ada4c3 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -7,9 +7,9 @@ on:
 
 jobs:
   release:
-    container: buildenv:5
+    container: buildenv:6
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Upload a candidate
         env:
           HACKAGE_PASSWORD: ${{ secrets.HACKAGE_PASSWORD }}
diff --git a/graphql.cabal b/graphql.cabal
index 8711047..77f73eb 100644
--- a/graphql.cabal
+++ b/graphql.cabal
@@ -21,7 +21,7 @@ extra-source-files:
   CHANGELOG.md
   README.md
 tested-with:
-  GHC == 9.12.2,
+  GHC == 9.12.4,
   GHC == 9.14.1
 
 source-repository head