diff --git a/metagpt/utils/git_repository.py b/metagpt/utils/git_repository.py
index 0b76d06ab..c4bdf0f4a 100644
--- a/metagpt/utils/git_repository.py
+++ b/metagpt/utils/git_repository.py
@@ -17,6 +17,7 @@ from typing import Dict, List
 from git.repo import Repo
 from git.repo.fun import is_git_dir
 from gitignore_parser import parse_gitignore
+from tenacity import retry, stop_after_attempt, wait_random_exponential
 
 from metagpt.logs import logger
 from metagpt.tools.libs.shell import shell_execute
@@ -287,11 +288,15 @@ class GitRepository:
         return files
 
     @classmethod
+    @retry(wait=wait_random_exponential(min=1, max=15), stop=stop_after_attempt(3))
     async def clone_from(cls, url: str | Path, output_dir: str | Path = None) -> "GitRepository":
         from metagpt.context import Context
 
         to_path = Path(output_dir or Path(__file__).parent / f"../../workspace/downloads/{uuid.uuid4().hex}").resolve()
         to_path.mkdir(parents=True, exist_ok=True)
+        repo_dir = to_path / Path(url).stem
+        if repo_dir.exists():
+            shutil.rmtree(repo_dir, ignore_errors=True)
         ctx = Context()
         env = ctx.new_environ()
         proxy = ["-c", f"http.proxy={ctx.config.proxy}"] if ctx.config.proxy else []
diff --git a/requirements.txt b/requirements.txt
index 2e6cce034..62ebea7b6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -60,7 +60,7 @@ gitignore-parser==0.1.9
 # connexion[uvicorn]~=3.0.5 # Used by metagpt/tools/openapi_v3_hello.py
 websockets~=11.0
 networkx~=3.2.1
-google-generativeai==0.3.2
+google-generativeai==0.4.1
 playwright>=1.26  # used at metagpt/tools/libs/web_scraping.py
 anytree
 ipywidgets==8.1.1