diff --git a/charts/kubeai/values.yaml b/charts/kubeai/values.yaml
index b00448a7..e4d5181b 100644
--- a/charts/kubeai/values.yaml
+++ b/charts/kubeai/values.yaml
@@ -18,7 +18,7 @@ modelServers:
       # The "default" image should always be specified.
       # "default" is used when no imageName is specified or if a specific image is not found.
       default: "vllm/vllm-openai:v0.6.4.post1"
-      cpu: "substratusai/vllm:v0.6.4.post1-cpu"
+      cpu: "substratusai/vllm:v0.6.3.post1-cpu"
       google-tpu: "substratusai/vllm:v0.6.4.post1-tpu"
       nvidia-gpu: "vllm/vllm-openai:v0.6.4.post1"
       # TODO (samos123) switch to the official image when it is available.