diff --git a/.forgejo/workflows/cleanup.yml b/.forgejo/workflows/cleanup.yml
new file mode 100644
index 0000000..a8de85f
--- /dev/null
+++ b/.forgejo/workflows/cleanup.yml
@@ -0,0 +1,58 @@
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "30 3 * * *"
+
+jobs:
+  cleanup-workflow-runs:
+    runs-on: docker
+    steps:
+      - name: Install Packages
+        run: apt-get update && apt-get install -y curl jq
+
+      - name: Delete workflow runs older than 14 days
+        env:
+          TOKEN: ${{ forgejo.token }}
+          API: ${{ forgejo.api_url }}
+          REPO: ${{ forgejo.repository }}
+          CURRENT_RUN_ID: ${{ forgejo.run_id }}
+        run: |
+          set -eu
+
+          CUTOFF="$(date -u -d "14 days ago" +"%Y-%m-%dT%H:%M:%SZ")"
+          PAGE=1
+          DELETE_IDS=delete-workflow-runs.txt
+
+          : > "$DELETE_IDS"
+
+          while :; do
+            curl -fsS \
+              -H "Authorization: token $TOKEN" \
+              "$API/repos/$REPO/actions/runs?page=$PAGE&limit=50" \
+              -o runs.json
+
+            COUNT="$(jq 'if type == "array" then length else (.workflow_runs // []) | length end' runs.json)"
+            test "$COUNT" -gt 0 || break
+
+            jq -r \
+              --arg cutoff "$CUTOFF" \
+              --arg current "$CURRENT_RUN_ID" \
+              'if type == "array" then . else (.workflow_runs // []) end
+                | .[]
+                | select(type == "object")
+                | select((.id | tostring) != $current)
+                | select((.status // .conclusion) as $status | ["success", "failure", "cancelled", "skipped", "succeeded", "failed"] | index($status))
+                | select((.created // .created_at) < $cutoff)
+                | .id' runs.json \
+              >> "$DELETE_IDS"
+
+            PAGE="$((PAGE + 1))"
+          done
+
+          while IFS= read -r run_id; do
+            test -n "$run_id" || continue
+            echo "Deleting workflow run $run_id"
+            curl -fsS -X DELETE \
+              -H "Authorization: token $TOKEN" \
+              "$API/repos/$REPO/actions/runs/$run_id"
+          done < "$DELETE_IDS"