diff --git a/packages/service/core/workflow/dispatch/tools/http468.ts b/packages/service/core/workflow/dispatch/tools/http468.ts
index 71ea700b7..6df026eaa 100644
--- a/packages/service/core/workflow/dispatch/tools/http468.ts
+++ b/packages/service/core/workflow/dispatch/tools/http468.ts
@@ -140,7 +140,8 @@ export const dispatchHttp468Request = async (props: HttpRequestProps): Promise<H
 
       if (typeof val === 'string') {
         if (isQuoted) {
-          return val.replace(/(?<!\\)"/g, '\\"');
+          // Replace newlines with escaped newlines
+          return val.replace(/\n/g, '\\n').replace(/(?<!\\)"/g, '\\"');
         }
         try {
           JSON.parse(val);