diff --git a/autocommit/git.py b/autocommit/git.py
index 47439a1..25550ca 100644
--- a/autocommit/git.py
+++ b/autocommit/git.py
@@ -13,6 +13,7 @@ class GitHandler:
             self.llm_client = llm_client
         else:
             from .llm import LLMClient
+
             self.llm_client = LLMClient()
 
     def get_diff(self) -> str:
@@ -21,7 +22,8 @@ class GitHandler:
             result = subprocess.run(
                 ["git", "diff", "--staged"],
                 capture_output=True,
-                text=True
+                text=True,
+                encoding="utf-8",
             )
             return result.stdout
         except FileNotFoundError:
@@ -35,7 +37,8 @@ class GitHandler:
             result = subprocess.run(
                 ["git", "commit", "-m", message],
                 capture_output=True,
-                text=True
+                text=True,
+                encoding="utf-8",
             )
             if result.returncode != 0:
                 raise Exception(f"Git 提交失败: {result.stderr}")