diff --git a/premerge/windows_runner_values.yaml b/premerge/windows_runner_values.yaml
index 505a0444..0bb78ad7 100644
--- a/premerge/windows_runner_values.yaml
+++ b/premerge/windows_runner_values.yaml
@@ -5,6 +5,9 @@ minRunners: 0
 maxRunners: 2
 
 template:
+  metadata:
+    annotations:
+      cluster-autoscaler.kubernetes.io/safe-to-evict: "false"
   spec:
     tolerations:
     - key: "node.kubernetes.io/os"