diff --git a/src/unisync/paths.py b/src/unisync/paths.py
index 6048c46..6bb6269 100644
--- a/src/unisync/paths.py
+++ b/src/unisync/paths.py
@@ -106,7 +106,7 @@ class PathsManager:
             if not is_contained and new_path not in paths_to_add:
                 paths_to_add.append(new_path)
 
-        with self.paths_file.open("w") as f:
+        with self.paths_file.open("a") as f:
             for p in paths_to_add:
                 f.write(p + "\n")