diff --git a/.github/workflows/pr-any.yml b/.github/workflows/pr-any.yml
index 09719567f13..b9a9d75568f 100644
--- a/.github/workflows/pr-any.yml
+++ b/.github/workflows/pr-any.yml
@@ -14,7 +14,9 @@ jobs:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
-        node-version: 'lts/*'
+        # This will default to using v20 so that CI will pass.
+        # ref: https://github.com/polkadot-js/api/issues/6017
+        node-version: 'lts/iron'
     - uses: denoland/setup-deno@v1
       with:
         deno-version: v1.42.x
diff --git a/.github/workflows/push-master.yml b/.github/workflows/push-master.yml
index 4082c93af48..b5b3859117e 100644
--- a/.github/workflows/push-master.yml
+++ b/.github/workflows/push-master.yml
@@ -24,7 +24,9 @@ jobs:
         token: ${{ secrets.GH_PAT_BOT }}
     - uses: actions/setup-node@v4
       with:
-        node-version: 'lts/*'
+        # This will default to using v20 so that CI will pass.
+        # ref: https://github.com/polkadot-js/api/issues/6017
+        node-version: 'lts/iron'
     - name: ${{ matrix.step }}
       run: |
         yarn install --immutable