diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
index 016f708bb..94a38c5d5 100644
--- a/.github/workflows/actionlint.yml
+++ b/.github/workflows/actionlint.yml
@@ -28,10 +28,10 @@ permissions:
 
 jobs:
   actionlint:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v7
+      - uses: useblacksmith/checkout@v1
       - name: Download actionlint
         run: bash <(curl -sSf https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash) 1.7.12
       - name: Run actionlint
diff --git a/.github/workflows/api-acceptance.yml b/.github/workflows/api-acceptance.yml
index 2f1ac3f80..5b7c03cdf 100644
--- a/.github/workflows/api-acceptance.yml
+++ b/.github/workflows/api-acceptance.yml
@@ -36,7 +36,7 @@ concurrency:
 
 jobs:
   official-client:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     timeout-minutes: 20
     services:
       postgres:
@@ -53,7 +53,7 @@ jobs:
           --health-timeout 5s
           --health-retries 10
     steps:
-      - uses: actions/checkout@v7
+      - uses: useblacksmith/checkout@v1
       - uses: actions/setup-go@v7
         with:
           go-version-file: go.mod
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 08d3efb77..ea5cfdbd3 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -20,7 +20,7 @@ concurrency:
 
 jobs:
   check:
-    runs-on: ubuntu-22.04
+    runs-on: blacksmith-16vcpu-ubuntu-2204
     timeout-minutes: 40
     services:
       postgres:
@@ -37,7 +37,7 @@ jobs:
           --health-timeout 5s
           --health-retries 10
     steps:
-      - uses: actions/checkout@v7
+      - uses: useblacksmith/checkout@v1
         with:
           ref: ${{ inputs.ref || github.sha }}
       - name: Select shared Go caches
diff --git a/.github/workflows/native.yml b/.github/workflows/native.yml
index 79dc7bf44..39e6594ab 100644
--- a/.github/workflows/native.yml
+++ b/.github/workflows/native.yml
@@ -43,7 +43,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, macos-14, windows-2022]
+        os: [blacksmith-4vcpu-ubuntu-2204, blacksmith-6vcpu-macos-15, blacksmith-4vcpu-windows-2025]
     runs-on: ${{ matrix.os }}
     timeout-minutes: 30
     defaults:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index fe48769a5..fa1731069 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -38,13 +38,13 @@ jobs:
 
   build:
     needs: native
-    runs-on: ubuntu-22.04
+    runs-on: blacksmith-4vcpu-ubuntu-2204
     timeout-minutes: 120
     outputs:
       revision: ${{ steps.source.outputs.revision }}
       release_tag: ${{ steps.source.outputs.release_tag }}
     steps:
-      - uses: actions/checkout@v7
+      - uses: useblacksmith/checkout@v1
         with:
           ref: ${{ inputs.ref || github.sha }}
           persist-credentials: false
@@ -135,11 +135,11 @@ jobs:
   release:
     if: github.event_name == 'push' || inputs.draft_release
     needs: [check, build]
-    runs-on: ubuntu-22.04
+    runs-on: blacksmith-4vcpu-ubuntu-2204
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v7
+      - uses: useblacksmith/checkout@v1
         with:
           ref: ${{ needs.build.outputs.revision }}
           persist-credentials: false