diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f70daca..8ca7387 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -15,7 +15,7 @@ concurrency:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     name: Test (Ruby ${{ matrix.ruby }})
     strategy:
       fail-fast: false
@@ -35,7 +35,7 @@ jobs:
         run: bundle exec rake test
 
   rubocop:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     name: Rubocop
     steps:
       - uses: actions/checkout@v6