diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index 95053fc..fedbb16 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -1,7 +1,9 @@
 name: Deploy
+# PLAT-77: push-to-main CDK deploy is frozen so HCP Terraform is the only
+# path that can change this stack. workflow_dispatch stays for an explicit
+# rollback of the management-account stack.
 on:
-  push:
-    branches: [main]
+  workflow_dispatch:
 
 permissions:
   id-token: write
@@ -13,7 +15,7 @@ concurrency:
 
 jobs:
   deploy:
-    uses: Sea-Haven-Industries/.github/.github/workflows/cd-cdk.yaml@0a1010e63248c9ca9f042c870eb2c579ba6b9455 # v1.0.19
+    uses: Sea-Haven-Industries/.github/.github/workflows/cd-cdk.yaml@9781774f04b824b1182ff41638687f1c01c04361 # v1.0.11
     with:
       node-version: "24"
     secrets: