diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2bb8e1d69217..38cf242814cf 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: carbonrunner-2vcpu-ubuntu-latest
     steps:
       - run: sudo apt-get update && sudo apt-get install -y libhdf5-dev
       - uses: actions/checkout@v6
diff --git a/.github/workflows/devcontainer_ci.yml b/.github/workflows/devcontainer_ci.yml
index d1b81593866f..694427bfbdca 100644
--- a/.github/workflows/devcontainer_ci.yml
+++ b/.github/workflows/devcontainer_ci.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: carbonrunner-2vcpu-ubuntu-latest
     steps:
       - uses: actions/checkout@v6
       - uses: devcontainers/ci@v0.3
diff --git a/.github/workflows/directory_writer.yml b/.github/workflows/directory_writer.yml
index deffbe9e364f..f6042e29bee6 100644
--- a/.github/workflows/directory_writer.yml
+++ b/.github/workflows/directory_writer.yml
@@ -4,7 +4,7 @@ name: directory_writer
 on: [push]
 jobs:
   directory_writer:
-    runs-on: ubuntu-latest
+    runs-on: carbonrunner-2vcpu-ubuntu-latest
     steps:
       - uses: actions/checkout@v6
         with:
diff --git a/.github/workflows/project_euler.yml b/.github/workflows/project_euler.yml
index 591b2163cc1a..31340ba4f04f 100644
--- a/.github/workflows/project_euler.yml
+++ b/.github/workflows/project_euler.yml
@@ -12,7 +12,7 @@ name: "Project Euler"
 
 jobs:
   project-euler:
-    runs-on: ubuntu-latest
+    runs-on: carbonrunner-2vcpu-ubuntu-latest
     steps:
       - run:
           sudo apt-get update && sudo apt-get install -y libtiff5-dev libjpeg8-dev libopenjp2-7-dev
diff --git a/.github/workflows/ruff.yml b/.github/workflows/ruff.yml
index 13df19c8d743..df71ef552097 100644
--- a/.github/workflows/ruff.yml
+++ b/.github/workflows/ruff.yml
@@ -9,7 +9,7 @@ on:
       - master
 jobs:
   ruff:
-    runs-on: ubuntu-latest
+    runs-on: carbonrunner-2vcpu-ubuntu-latest
     steps:
       - uses: actions/checkout@v6
       - uses: astral-sh/setup-uv@v7
diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index bf0a74a239c8..e4f46967a023 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -51,7 +51,7 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     if: github.event_name != 'pull_request'
     needs: build_docs
-    runs-on: ubuntu-latest
+    runs-on: carbonrunner-2vcpu-ubuntu-latest
     steps:
       - uses: actions/deploy-pages@v4
         id: deployment