diff --git a/web/src/pages/agent/form/token-chunker-form/index.tsx b/web/src/pages/agent/form/token-chunker-form/index.tsx
index 18fc217546..b61af84747 100644
--- a/web/src/pages/agent/form/token-chunker-form/index.tsx
+++ b/web/src/pages/agent/form/token-chunker-form/index.tsx
@@ -97,6 +97,7 @@ const TokenChunkerForm = ({
             <SliderInputFormField
               name="chunk_token_size"
               max={2048}
+              min={1}
               label={t('knowledgeConfiguration.chunkTokenNumber')}
             />
             <SliderInputFormField