diff --git a/backend/app/engine/loaders/__init__.py b/backend/app/engine/loaders/__init__.py
index a220170..6a906ca 100644
--- a/backend/app/engine/loaders/__init__.py
+++ b/backend/app/engine/loaders/__init__.py
@@ -9,7 +9,7 @@ logger = logging.getLogger(__name__)
 
 
 def load_configs():
-    with open("config/loaders.yaml") as f:
+    with open("config/loaders.yaml",encoding='UTF-8') as f:
         configs = yaml.safe_load(f)
     return configs
 
diff --git a/backend/app/engine/tools/__init__.py b/backend/app/engine/tools/__init__.py
index 1aced70..054308e 100644
--- a/backend/app/engine/tools/__init__.py
+++ b/backend/app/engine/tools/__init__.py
@@ -1,10 +1,9 @@
-import os
-import yaml
-import json
 import importlib
-from cachetools import cached, LRUCache
-from llama_index.core.tools.tool_spec.base import BaseToolSpec
+import os
+
+import yaml
 from llama_index.core.tools.function_tool import FunctionTool
+from llama_index.core.tools.tool_spec.base import BaseToolSpec
 
 
 class ToolType:
@@ -46,7 +45,7 @@ class ToolFactory:
     def from_env() -> list[FunctionTool]:
         tools = []
         if os.path.exists("config/tools.yaml"):
-            with open("config/tools.yaml", "r") as f:
+            with open("config/tools.yaml", "r", encoding='UTF-8') as f:
                 tool_configs = yaml.safe_load(f)
                 if tool_configs != None and len(tool_configs.items()) != 0:
                     for tool_type, config_entries in tool_configs.items():