diff --git a/charts/vald/values/multi-vald/dev-vald-01.yaml b/charts/vald/values/multi-vald/dev-vald-01.yaml
index 45a75fc4611..dd6ed283433 100644
--- a/charts/vald/values/multi-vald/dev-vald-01.yaml
+++ b/charts/vald/values/multi-vald/dev-vald-01.yaml
@@ -28,3 +28,7 @@ gateway:
       name: vald-mirror-01
     serviceAccount:
       name: vald-mirror-01
+
+agent:
+  ngt:
+    dimension: 784
diff --git a/charts/vald/values/multi-vald/dev-vald-02.yaml b/charts/vald/values/multi-vald/dev-vald-02.yaml
index 51c4440f0f1..c3acd6a9fae 100644
--- a/charts/vald/values/multi-vald/dev-vald-02.yaml
+++ b/charts/vald/values/multi-vald/dev-vald-02.yaml
@@ -32,3 +32,7 @@ gateway:
       name: vald-mirror-02
     serviceAccount:
       name: vald-mirror-02
+
+agent:
+  ngt:
+    dimension: 784
diff --git a/charts/vald/values/multi-vald/dev-vald-03.yaml b/charts/vald/values/multi-vald/dev-vald-03.yaml
index 51d9ab564b0..5aef7cc24b2 100644
--- a/charts/vald/values/multi-vald/dev-vald-03.yaml
+++ b/charts/vald/values/multi-vald/dev-vald-03.yaml
@@ -32,3 +32,7 @@ gateway:
       name: vald-mirror-03
     serviceAccount:
       name: vald-mirror-03
+
+agent:
+  ngt:
+    dimension: 784
diff --git a/example/helm/values.yaml b/example/helm/values.yaml
index cb786dc4214..df620f690dd 100644
--- a/example/helm/values.yaml
+++ b/example/helm/values.yaml
@@ -64,7 +64,7 @@ agent:
       memory: 150Mi
   ngt:
     # The number of dimensions for feature vector of fashion-mnist dataset.
-    dimension: 784
+    dimension: 300
     # We use L2-Norm for distance_type.
     distance_type: cos
     # The type of fashion-mnist's feature vectors.