diff --git a/docs/_static/custom.css b/docs/_static/custom.css
new file mode 100644
index 000000000..a93b27626
--- /dev/null
+++ b/docs/_static/custom.css
@@ -0,0 +1,5 @@
+@import url('https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap');
+
+html[lang="ru"] body {
+    font-family: 'PT Sans', Arial, sans-serif;
+}
diff --git a/docs/conf.py b/docs/conf.py
index f8ab96dfc..ec0fb703f 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -48,3 +48,8 @@
     "collapse_navigation": False,
     "navigation_depth": 2,
 }
+
+
+def setup(app):
+    """Add custom CSS files."""
+    app.add_css_file("custom.css")