diff --git a/chart/azimuth-ui.schema.yaml b/chart/azimuth-ui.schema.yaml
index c31af4b..f0049f1 100644
--- a/chart/azimuth-ui.schema.yaml
+++ b/chart/azimuth-ui.schema.yaml
@@ -15,6 +15,8 @@ controls:
   # constrain to (optional) integer here.
   /api/modelMaxContextLength:
     type: IntegerControl
+    minimum: 100
+    step: 100
     required: false
 
 sortOrder:
diff --git a/chart/templates/api/deployment.yml b/chart/templates/api/deployment.yml
index 56007c8..6a3e9a7 100644
--- a/chart/templates/api/deployment.yml
+++ b/chart/templates/api/deployment.yml
@@ -31,7 +31,7 @@ spec:
           {{- include "azimuth-llm.chatTemplate" . | nindent 10 }}
           {{- if .Values.api.modelMaxContextLength -}}
           - --max-model-len
-          - {{ .Values.api.modelMaxContextLength }}
+          - {{ .Values.api.modelMaxContextLength | quote }}
           {{- end -}}
           {{- if .Values.api.extraArgs -}}
           {{- .Values.api.extraArgs | toYaml | nindent 10 }}