diff --git a/web/config/index.ts b/web/config/index.ts
index 2bc76a481c..5f2fc97178 100644
--- a/web/config/index.ts
+++ b/web/config/index.ts
@@ -344,7 +344,7 @@ export const VAR_REGEX
 
 export const resetReg = () => (VAR_REGEX.lastIndex = 0)
 
-export const HITL_INPUT_REG = /\{\{(#\$output\.(?:[\p{L}_][\p{L}\d_]{0,29}){1,10}#)\}\}/giu
+export const HITL_INPUT_REG = /\{\{(#\$output\.(?:[a-z_]\w{0,29}){1,10}#)\}\}/gi
 export const resetHITLInputReg = () => HITL_INPUT_REG.lastIndex = 0
 
 export const DISABLE_UPLOAD_IMAGE_AS_ICON = process.env.NEXT_PUBLIC_DISABLE_UPLOAD_IMAGE_AS_ICON === 'true'