diff --git a/app/components/welcome/index.tsx b/app/components/welcome/index.tsx
index 9b18105..b795261 100644
--- a/app/components/welcome/index.tsx
+++ b/app/components/welcome/index.tsx
@@ -177,7 +177,10 @@ const Welcome: FC<IWelcomeProps> = ({
   const canChat = () => {
     const inputLens = Object.values(inputs).length
     const promptVariablesLens = promptConfig.prompt_variables.length
-    const emptyInput = inputLens < promptVariablesLens || Object.values(inputs).filter(v => v === '').length > 0
+    const emptyInput = inputLens < promptVariablesLens || Object.entries(inputs).filter(([k, v]) => {
+      const isRequired = promptConfig.prompt_variables.find(item => item.key === k)?.required ?? true
+      return isRequired && v === ''
+    }).length > 0
     if (emptyInput) {
       logError(t('app.errorMessage.valueOfVarRequired'))
       return false