diff --git a/metagpt/actions/project_management.py b/metagpt/actions/project_management.py
index 641d21533..d679a730c 100644
--- a/metagpt/actions/project_management.py
+++ b/metagpt/actions/project_management.py
@@ -15,7 +15,7 @@ from typing import List
 from metagpt.actions import ActionOutput
 from metagpt.actions.action import Action
 from metagpt.config import CONFIG
-from metagpt.const import SYSTEM_DESIGN_FILE_REPO, TASK_FILE_REPO, TASK_PDF_FILE_REPO
+from metagpt.const import SYSTEM_DESIGN_FILE_REPO, TASK_FILE_REPO, TASK_PDF_FILE_REPO, PACKAGE_REQUIREMENTS_FILENAME
 from metagpt.logs import logger
 from metagpt.schema import Document, Documents
 from metagpt.utils.get_template import get_template
@@ -263,16 +263,15 @@ class WriteTasks(Action):
         m = json.loads(doc.content)
         packages = set(m.get("Required Python third-party packages", set()))
         file_repo = CONFIG.git_repo.new_file_repository()
-        filename = "requirements.txt"
-        requirement_doc = await file_repo.get(filename)
+        requirement_doc = await file_repo.get(filename=PACKAGE_REQUIREMENTS_FILENAME)
         if not requirement_doc:
-            requirement_doc = Document(filename=filename, root_path=".", content="")
+            requirement_doc = Document(filename=PACKAGE_REQUIREMENTS_FILENAME, root_path=".", content="")
         lines = requirement_doc.content.splitlines()
         for pkg in lines:
             if pkg == "":
                 continue
             packages.add(pkg)
-        await file_repo.save(filename, content="\n".join(packages))
+        await file_repo.save(PACKAGE_REQUIREMENTS_FILENAME, content="\n".join(packages))
 
     @staticmethod
     async def _save_pdf(task_doc):
diff --git a/metagpt/const.py b/metagpt/const.py
index a8c7356ca..ce06655f1 100644
--- a/metagpt/const.py
+++ b/metagpt/const.py
@@ -53,6 +53,8 @@ MESSAGE_ROUTE_TO_ALL = "<all>"
 MESSAGE_ROUTE_TO_NONE = "<none>"
 
 REQUIREMENT_FILENAME = "requirement.txt"
+PACKAGE_REQUIREMENTS_FILENAME = "requirements.txt"
+
 DOCS_FILE_REPO = "docs"
 PRDS_FILE_REPO = "docs/prds"
 SYSTEM_DESIGN_FILE_REPO = "docs/system_design"