diff --git a/metagpt/utils/dependency_file.py b/metagpt/utils/dependency_file.py
index a11e606a9..d34e7ae9a 100644
--- a/metagpt/utils/dependency_file.py
+++ b/metagpt/utils/dependency_file.py
@@ -91,7 +91,7 @@ class DependencyFile:
         try:
             key = Path(filename).relative_to(root).as_posix()
         except ValueError:
-            key= Path(filename).as_posix()
+            key = Path(filename).as_posix()
         return set(self._dependencies.get(str(key), {}))
 
     def delete_file(self):