diff --git a/lightweight_charts/abstract.py b/lightweight_charts/abstract.py
index aad9ab1..aee2875 100644
--- a/lightweight_charts/abstract.py
+++ b/lightweight_charts/abstract.py
@@ -17,7 +17,7 @@ from .util import (
 )
 
 current_dir = os.path.dirname(os.path.abspath(__file__))
-INDEX = os.path.join(current_dir, 'js', 'test.html')
+INDEX = os.path.join(current_dir, 'js', 'index.html')
 
 
 class Window:
diff --git a/lightweight_charts/js/test.html b/lightweight_charts/js/index.html
similarity index 95%
rename from lightweight_charts/js/test.html
rename to lightweight_charts/js/index.html
index 827d7c6..8f2dd94 100644
--- a/lightweight_charts/js/test.html
+++ b/lightweight_charts/js/index.html
@@ -5,6 +5,7 @@
     <link rel="stylesheet" href="styles.css">
     <script src="./lightweight-charts.js"></script>
     <meta name="viewport" content ="width=device-width, initial-scale=1">
+    <meta charset="UTF-8">
     <style>
     body {
         margin: 0;
diff --git a/lightweight_charts/widgets.py b/lightweight_charts/widgets.py
index 7b18fd4..c347c45 100644
--- a/lightweight_charts/widgets.py
+++ b/lightweight_charts/widgets.py
@@ -117,11 +117,11 @@ class StaticLWC(abstract.AbstractChart):
     def __init__(self, width=None, height=None, inner_width=1, inner_height=1,
                  scale_candles_only: bool = False, toolbox=False, autosize=True):
 
-        with open(abstract.INDEX.replace("test.html", 'styles.css'), 'r') as f:
+        with open(abstract.INDEX.replace("index.html", 'styles.css'), 'r') as f:
             css = f.read()
-        with open(abstract.INDEX.replace("test.html", 'bundle.js'), 'r') as f:
+        with open(abstract.INDEX.replace("index.html", 'bundle.js'), 'r') as f:
             js = f.read()
-        with open(abstract.INDEX.replace("test.html", 'lightweight-charts.js'), 'r') as f:
+        with open(abstract.INDEX.replace("index.html", 'lightweight-charts.js'), 'r') as f:
             lwc = f.read()
 
         with open(abstract.INDEX, 'r') as f: