diff --git a/epanet/epanet.py b/epanet/epanet.py
index fe2d077..acf42cd 100644
--- a/epanet/epanet.py
+++ b/epanet/epanet.py
@@ -309,8 +309,8 @@ def run_project(name: str, readable_output: bool = False) -> str:
         # 启动子进程
         with subprocess.Popen(
             command,
-            stdout=subprocess.STDOUT,
-            stderr=subprocess.STDOUT,  # 合并错误输出和标准输出
+            stdout=subprocess.PIPE,
+            stderr=subprocess.STDOUT, # 合并错误输出和标准输出
             text=True,                # 文本模式（Python 3.7+）
             bufsize=1,                # 行缓冲
             encoding='utf-8',         # 编码设置