diff --git a/api/core/tools/provider/builtin_tool_provider.py b/api/core/tools/provider/builtin_tool_provider.py
index 0dc29b8a04..93e7d5a39e 100644
--- a/api/core/tools/provider/builtin_tool_provider.py
+++ b/api/core/tools/provider/builtin_tool_provider.py
@@ -58,7 +58,7 @@ class BuiltinToolProviderController(ToolProviderController):
         tool_files = list(filter(lambda x: x.endswith(".yaml") and not x.startswith("__"), listdir(tool_path)))
         tools = []
         for tool_file in tool_files:
-            with open(path.join(tool_path, tool_file)) as f:
+            with open(path.join(tool_path, tool_file), encoding='utf-8') as f:
                 # get tool name
                 tool_name = tool_file.split(".")[0]
                 tool = load(f.read(), FullLoader)
@@ -287,4 +287,4 @@ class BuiltinToolProviderController(ToolProviderController):
             :param tool_name: the name of the tool, defined in `get_tools`
             :param credentials: the credentials of the tool
         """
-        pass
\ No newline at end of file
+        pass