diff --git a/kubernetes/windows/Dockerfile b/kubernetes/windows/Dockerfile
index a18404772..c8162b539 100644
--- a/kubernetes/windows/Dockerfile
+++ b/kubernetes/windows/Dockerfile
@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/windows/servercore:ltsc2019
+FROM mcr.microsoft.com/windows/servercore@sha256:921bed01c2a023310bdbaa288edebd82c4910e536ff206b87e9cbe703ca27505
 MAINTAINER OMSContainers@microsoft.com
 LABEL vendor=Microsoft\ Corp \
     com.microsoft.product="Azure Monitor for containers"