diff --git a/.gitignore b/.gitignore
index 6bc67fa61..1542bbb98 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,7 @@
 ### Python template
 
 # Byte-compiled / optimized / DLL files
-__pycache__/
+__pycache__
 *.py[cod]
 *$py.class
 
diff --git a/metagpt/utils/tree.py b/metagpt/utils/tree.py
index fbf085e48..bd7922290 100644
--- a/metagpt/utils/tree.py
+++ b/metagpt/utils/tree.py
@@ -130,7 +130,7 @@ def _add_line(rows: List[str]) -> List[str]:
 
 
 def _execute_tree(root: Path, gitignore: str | Path) -> str:
-    args = ["--gitignore", str(gitignore)] if gitignore else []
+    args = ["--gitfile", str(gitignore)] if gitignore else []
     try:
         result = subprocess.run(["tree"] + args + [str(root)], capture_output=True, text=True, check=True)
         if result.returncode != 0: