diff --git a/.github/workflows/check-pull-request.yml b/.github/workflows/check-pull-request.yml
index a6a897d..db11990 100644
--- a/.github/workflows/check-pull-request.yml
+++ b/.github/workflows/check-pull-request.yml
@@ -30,6 +30,9 @@ jobs:
     if: ${{ !startsWith(github.head_ref, 'release/') }}
     name: Rustfmt
     runs-on: ubuntu-latest
+    container:
+      # contains the nightly-toolchain
+      image: docker.io/paritytech/ci-unified:bullseye-1.75.0-2024-01-22-v20240109
     continue-on-error: false
     steps:
       - uses: actions/checkout@v4