diff --git a/example/helm/values.yaml b/example/helm/values.yaml
index 8b292fbcaf..240917aba1 100644
--- a/example/helm/values.yaml
+++ b/example/helm/values.yaml
@@ -62,7 +62,7 @@ agent:
     # The number of dimensions for feature vector of fashion-mnist dataset.
     dimension: 784
     # We use L2-Norm for distance_type.
-    distance_type: cos
+    distance_type: l2
     # The type of fashion-mnist's feature vectors.
     object_type: float
     # Check duration of automatic indexing.