diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5ab083a..be759be 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,7 +4,7 @@ jobs:
 
   #################### Unittests ####################
   unittest:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2204
     strategy:
       matrix:
         python-version: [3.8,3.9,"3.10","3.12"]
@@ -13,7 +13,7 @@ jobs:
         uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
         id: python
-        uses: actions/setup-python@v5
+        uses: useblacksmith/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 4670c55..2cd384c 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -21,7 +21,7 @@ on:
 jobs:
   analyze:
     name: Analyze
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2204
     permissions:
       actions: read
       contents: read