diff --git a/.github/workflows/theseus-build.yml b/.github/workflows/theseus-build.yml
index 175ce7579..78db808c6 100644
--- a/.github/workflows/theseus-build.yml
+++ b/.github/workflows/theseus-build.yml
@@ -56,15 +56,15 @@ jobs:
         platform:
           [
             blacksmith-6vcpu-macos-26,
-            blacksmith-8vcpu-windows-2025,
-            blacksmith-8vcpu-ubuntu-2404,
+            blacksmith-4vcpu-windows-2025,
+            blacksmith-4vcpu-ubuntu-2404,
           ]
         include:
           - platform: blacksmith-6vcpu-macos-26
             artifact-target-name: universal-apple-darwin
-          - platform: blacksmith-8vcpu-windows-2025
+          - platform: blacksmith-4vcpu-windows-2025
             artifact-target-name: x86_64-pc-windows-msvc
-          - platform: blacksmith-8vcpu-ubuntu-2404
+          - platform: blacksmith-4vcpu-ubuntu-2404
             artifact-target-name: x86_64-unknown-linux-gnu
 
     runs-on: ${{ matrix.platform }}
diff --git a/.github/workflows/theseus-release.yml b/.github/workflows/theseus-release.yml
index 030bf7349..c0331c33b 100644
--- a/.github/workflows/theseus-release.yml
+++ b/.github/workflows/theseus-release.yml
@@ -15,7 +15,7 @@ jobs:
       github.event.workflow_run.conclusion == 'success' &&
       github.event.workflow_run.event == 'push' &&
       startsWith(github.event.workflow_run.head_branch, 'v')
-    runs-on: blacksmith-8vcpu-ubuntu-2404
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     env:
       VERSION_TAG: ${{ github.event.workflow_run.head_branch }}
       LINUX_X64_BUNDLE_ARTIFACT_NAME: App bundle (x86_64-unknown-linux-gnu)