diff --git a/.azure/azure-osx-template.yml b/.azure/azure-osx-template.yml
index 6ac76b2..df36611 100644
--- a/.azure/azure-osx-template.yml
+++ b/.azure/azure-osx-template.yml
@@ -20,7 +20,7 @@ jobs:
   steps:
   - task: Cache@2
     inputs:
-      key: ${{ parameters.name }} | "${{ parameters.vmImage }}" | $(STACK_YAML) | stack-root | $(Agent.OS) | version3
+      key: ${{ parameters.name }} | "${{ parameters.vmImage }}" | $(STACK_YAML) | stack-root | $(Agent.OS) | version4
       path: $(STACK_ROOT)
       cacheHitVar: CACHE_RESTORED
     displayName: Cache stack root