diff --git a/charts/core/templates/ray-service/ray-service.yaml b/charts/core/templates/ray-service/ray-service.yaml
index 5846acd6..b2e8f38d 100644
--- a/charts/core/templates/ray-service/ray-service.yaml
+++ b/charts/core/templates/ray-service/ray-service.yaml
@@ -114,6 +114,9 @@ spec:
       maxReplicas: {{ $workerGroupSpecs.maxReplicas }}
       groupName: {{ $workerGroupSpecs.groupName }}
       rayStartParams:
+        {{- if $workerGroupSpecs.gpuWorkerGroup.enabled }}
+        num-cpus: "0"
+        {{- end }}
         {{- if $workerGroupSpecs.gpuWorkerGroup.customResource }}
         resources: {{ $workerGroupSpecs.gpuWorkerGroup.customResource }}
         {{- end }}
diff --git a/charts/core/values.yaml b/charts/core/values.yaml
index 7901cf11..2a4a21ae 100644
--- a/charts/core/values.yaml
+++ b/charts/core/values.yaml
@@ -687,11 +687,11 @@ rayService:
   headGroupSpec:
     resources:
       limits:
-        cpu: "0"
+        cpu: "2"
         memory: "4Gi"
         nvidia.com/gpu: 0
       requests:
-        cpu: "0"
+        cpu: "2"
         memory: "4Gi"
         nvidia.com/gpu: 0
     affinity: {}