diff --git a/request_llms/bridge_moonshot.py b/request_llms/bridge_moonshot.py
index e1b3cd4842..20983fd9f8 100644
--- a/request_llms/bridge_moonshot.py
+++ b/request_llms/bridge_moonshot.py
@@ -31,7 +31,7 @@ def __converter_file(self, user_input: str):
                     files.append(f)
                 for file in files:
                     if file.split('.')[-1] in ['pdf']:
-                        with open(file, 'r') as fp:
+                        with open(file, 'r', encoding='utf8') as fp:
                             from crazy_functions.crazy_utils import read_and_clean_pdf_text
                             file_content, _ = read_and_clean_pdf_text(fp)
                         what_ask.append({"role": "system", "content": file_content})
diff --git a/themes/common.py b/themes/common.py
index dc9b0575b9..f3ee23d727 100644
--- a/themes/common.py
+++ b/themes/common.py
@@ -29,7 +29,7 @@ def minimize_js(common_js_path):
             os.remove(old_min_js)
         # use rjsmin to minimize `common_js_path`
         c_jsmin = rjsmin.jsmin
-        with open(common_js_path, "r") as f:
+        with open(common_js_path, "r", encoding='utf-8') as f:
             js_content = f.read()
         if common_js_path == "themes/common.js":
             js_content = inject_mutex_button_code(js_content)
@@ -38,7 +38,7 @@ def minimize_js(common_js_path):
         sha_hash = hashlib.sha256(minimized_js_content.encode()).hexdigest()[:8]
         minimized_js_path = common_js_path + '.min.' + sha_hash + '.js'
         # save to minimized js file
-        with open(minimized_js_path, "w") as f:
+        with open(minimized_js_path, "w", encoding='utf-8') as f:
             f.write(minimized_js_content)
         # return minimized js file path
         return minimized_js_path