diff --git a/ChatQnA/benchmark/performance/helm_charts/deployment.py b/ChatQnA/benchmark/performance/helm_charts/deployment.py
index e5ae0a838..0c7649821 100644
--- a/ChatQnA/benchmark/performance/helm_charts/deployment.py
+++ b/ChatQnA/benchmark/performance/helm_charts/deployment.py
@@ -69,7 +69,7 @@ def generate_yaml(num_nodes, mode="oob", with_rerank="True"):
         {
             "name": "llm-dependency-deploy",
             "args": [
-                {"name": "--model-id", "value": '$(LLM_MODEL_ID)'},
+                {"name": "--model-id", "value": "$(LLM_MODEL_ID)"},
                 {"name": "--max-input-length", "value": 1280},
                 {"name": "--max-total-tokens", "value": 2048},
                 {"name": "--max-batch-total-tokens", "value": 35536},