diff --git a/.github/workflows/build-unstable.yml b/.github/workflows/build-unstable.yml
index 73b0ba35..e27303e4 100644
--- a/.github/workflows/build-unstable.yml
+++ b/.github/workflows/build-unstable.yml
@@ -20,7 +20,7 @@ on:
 
 jobs:
     BuildAndTest:
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-8core
         defaults:
             run:
                 working-directory: pyscriptjs
diff --git a/.github/workflows/prepare-release.yml b/.github/workflows/prepare-release.yml
index 944eeef1..98e995c5 100644
--- a/.github/workflows/prepare-release.yml
+++ b/.github/workflows/prepare-release.yml
@@ -15,7 +15,7 @@ defaults:
 
 jobs:
     build:
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-8core
         steps:
             - name: Checkout
               uses: actions/checkout@v3
diff --git a/.github/workflows/publish-release.yml b/.github/workflows/publish-release.yml
index 304fc759..04771978 100644
--- a/.github/workflows/publish-release.yml
+++ b/.github/workflows/publish-release.yml
@@ -14,7 +14,7 @@ defaults:
 
 jobs:
     build:
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-latest-8core
         permissions:
             contents: read
             id-token: write