diff --git a/.forgejo/workflows/integration.yml b/.forgejo/workflows/integration.yml
index 05fc2dc..1558dc2 100644
--- a/.forgejo/workflows/integration.yml
+++ b/.forgejo/workflows/integration.yml
@@ -11,8 +11,8 @@ jobs:
     strategy:
       matrix:
         info:
-          - version: "1.21.0-7-rc2"
-            image: codeberg.org/forgejo-experimental/forgejo
+          - version: "1.21"
+            image: codeberg.org/forgejo/forgejo
           - version: "1.20"
             image: codeberg.org/forgejo/forgejo
     steps:
@@ -29,3 +29,5 @@ jobs:
 
           echo "============================ demo ==================="
           forgejo-test-helper.sh run_workflow testdata/demo $url root demo setup-forgejo $token
+          echo "============================ IPv6 ==================="
+          forgejo-test-helper.sh run_workflow testdata/ipv6 $url root ipv6 setup-forgejo $token
diff --git a/runner-config.yaml b/runner-config.yaml
index 8f5f076..4f14a27 100644
--- a/runner-config.yaml
+++ b/runner-config.yaml
@@ -19,6 +19,7 @@ cache:
 
 container:
   network: "bridge"
+  enable_ipv6: true
   privileged: false
   options:
   workdir_parent:
diff --git a/testdata/ipv6/.forgejo/workflows/test.yml b/testdata/ipv6/.forgejo/workflows/test.yml
new file mode 100644
index 0000000..0eed094
--- /dev/null
+++ b/testdata/ipv6/.forgejo/workflows/test.yml
@@ -0,0 +1,11 @@
+on: [push]
+jobs:
+  ipv6:
+    runs-on: docker
+    container:
+      image: debian:bookworm
+    steps:
+      - run: |
+          set -x
+          apt update -qq ; apt --quiet install -qq --yes iputils-ping
+          ping -c 1 -6 ::1