diff --git a/.github/workflows/publish-to-pypi.yml b/.github/workflows/publish-to-pypi.yml
index 87ac2992f..e5561dd62 100644
--- a/.github/workflows/publish-to-pypi.yml
+++ b/.github/workflows/publish-to-pypi.yml
@@ -5,7 +5,7 @@ on: workflow_dispatch
 jobs:
   build-n-publish:
     name: Build and publish to PyPI
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     steps:
     - uses: actions/checkout@v2
       with:
diff --git a/.github/workflows/publish-to-test-pypi.yml b/.github/workflows/publish-to-test-pypi.yml
index 5544c37ef..5c8666b76 100644
--- a/.github/workflows/publish-to-test-pypi.yml
+++ b/.github/workflows/publish-to-test-pypi.yml
@@ -5,7 +5,7 @@ on: workflow_dispatch
 jobs:
   build-n-publish:
     name: Build and publish to Test PyPI
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     steps:
     - uses: actions/checkout@v2
       with:
diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 80d788442..702d58db9 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   format:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     strategy:
       matrix:
         python-version: [3.7]
@@ -25,7 +25,7 @@ jobs:
       run: tox -e format
 
   pep8:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     strategy:
       matrix:
         python-version: [3.7]
@@ -51,7 +51,7 @@ jobs:
         python-version: [
           ["3.7", "37"], ["3.8", "38"], ["3.9", "39"], ["3.10", "310"]
         ]
-        os: [ubuntu-latest, macos-latest]
+        os: [blacksmith-4vcpu-ubuntu-2404, macos-latest]
     runs-on: ${{ matrix.os }}
     name: ${{ matrix.os }} (${{ matrix.python-version[0] }})
     steps: