diff --git a/web/app/components/workflow/nodes/code/use-config.ts b/web/app/components/workflow/nodes/code/use-config.ts
index fd72f6b006..a5498d6c62 100644
--- a/web/app/components/workflow/nodes/code/use-config.ts
+++ b/web/app/components/workflow/nodes/code/use-config.ts
@@ -58,9 +58,12 @@ const useConfig = (id: string, payload: CodeNodeType) => {
   }, [inputs, setInputs])
 
   const handleCodeLanguageChange = useCallback((codeLanguage: CodeLanguage) => {
+    const currDefaultConfig = allLanguageDefault?.[codeLanguage]
+
     const newInputs = produce(inputs, (draft) => {
-      const currDefaultConfig = allLanguageDefault![codeLanguage]
       draft.code_language = codeLanguage
+      if (!currDefaultConfig)
+        return
       draft.code = currDefaultConfig.code
       draft.variables = currDefaultConfig.variables
       draft.outputs = currDefaultConfig.outputs