diff --git a/modules/html_generator.py b/modules/html_generator.py
index eac7d91a..af64894e 100644
--- a/modules/html_generator.py
+++ b/modules/html_generator.py
@@ -39,15 +39,16 @@ def minify_css(css: str) -> str:
     return css
 
 
-with open(Path(__file__).resolve().parent / '../css/html_readable_style.css', 'r') as f:
+with open(Path(__file__).resolve().parent / '../css/html_readable_style.css', 'r', encoding='utf-8') as f:
     readable_css = f.read()
-with open(Path(__file__).resolve().parent / '../css/html_instruct_style.css', 'r') as f:
+with open(Path(__file__).resolve().parent / '../css/html_instruct_style.css', 'r', encoding='utf-8') as f:
     instruct_css = f.read()
 
 # Custom chat styles
 chat_styles = {}
 for k in get_available_chat_styles():
-    chat_styles[k] = open(Path(f'css/chat_style-{k}.css'), 'r').read()
+    with open(Path(f'css/chat_style-{k}.css'), 'r', encoding='utf-8') as f:
+        chat_styles[k] = f.read()
 
 # Handle styles that derive from other styles
 for k in chat_styles:
diff --git a/modules/ui.py b/modules/ui.py
index ca1ff528..59da5118 100644
--- a/modules/ui.py
+++ b/modules/ui.py
@@ -19,27 +19,27 @@ _last_extensions = None
 _last_show_controls = None
 _last_theme_state = None
 
-with open(Path(__file__).resolve().parent / '../css/NotoSans/stylesheet.css', 'r') as f:
+with open(Path(__file__).resolve().parent / '../css/NotoSans/stylesheet.css', 'r', encoding='utf-8') as f:
     css = f.read()
-with open(Path(__file__).resolve().parent / '../css/main.css', 'r') as f:
+with open(Path(__file__).resolve().parent / '../css/main.css', 'r', encoding='utf-8') as f:
     css += f.read()
-with open(Path(__file__).resolve().parent / '../css/katex/katex.min.css', 'r') as f:
+with open(Path(__file__).resolve().parent / '../css/katex/katex.min.css', 'r', encoding='utf-8') as f:
     css += f.read()
-with open(Path(__file__).resolve().parent / '../css/highlightjs/highlightjs-copy.min.css', 'r') as f:
+with open(Path(__file__).resolve().parent / '../css/highlightjs/highlightjs-copy.min.css', 'r', encoding='utf-8') as f:
     css += f.read()
-with open(Path(__file__).resolve().parent / '../js/main.js', 'r') as f:
+with open(Path(__file__).resolve().parent / '../js/main.js', 'r', encoding='utf-8') as f:
     js = f.read()
-with open(Path(__file__).resolve().parent / '../js/global_scope_js.js', 'r') as f:
+with open(Path(__file__).resolve().parent / '../js/global_scope_js.js', 'r', encoding='utf-8') as f:
     global_scope_js = f.read()
-with open(Path(__file__).resolve().parent / '../js/save_files.js', 'r') as f:
+with open(Path(__file__).resolve().parent / '../js/save_files.js', 'r', encoding='utf-8') as f:
     save_files_js = f.read()
-with open(Path(__file__).resolve().parent / '../js/switch_tabs.js', 'r') as f:
+with open(Path(__file__).resolve().parent / '../js/switch_tabs.js', 'r', encoding='utf-8') as f:
     switch_tabs_js = f.read()
-with open(Path(__file__).resolve().parent / '../js/show_controls.js', 'r') as f:
+with open(Path(__file__).resolve().parent / '../js/show_controls.js', 'r', encoding='utf-8') as f:
     show_controls_js = f.read()
-with open(Path(__file__).resolve().parent / '../js/update_big_picture.js', 'r') as f:
+with open(Path(__file__).resolve().parent / '../js/update_big_picture.js', 'r', encoding='utf-8') as f:
     update_big_picture_js = f.read()
-with open(Path(__file__).resolve().parent / '../js/dark_theme.js', 'r') as f:
+with open(Path(__file__).resolve().parent / '../js/dark_theme.js', 'r', encoding='utf-8') as f:
     dark_theme_js = f.read()
 
 refresh_symbol = '🔄'