set `font-display` to `swap`
diff --git a/_scss/main.scss b/_scss/main.scss
index 47180c1..fbc04da 100644
--- a/_scss/main.scss
+++ b/_scss/main.scss
@@ -22,6 +22,7 @@
     font-family: 'Open Sans';
     font-style: normal;
     font-weight: 400;
+    font-display: swap;
     src: url(font/OpenSans-Regular.ttf) format('truetype');
 }
 
@@ -29,6 +30,7 @@
     font-family: 'Open Sans';
     font-style: bold;
     font-weight: 800;
+    font-display: swap;
     src: url(font/OpenSans-Bold.ttf) format('truetype');
 }