diff --git a/src/template.html b/src/template.html
index 79bed3a..b580f32 100644
--- a/src/template.html
+++ b/src/template.html
@@ -1,5 +1,5 @@
 <!doctype html>
-<html lang='en' prefix='https://ogp.me/ns/article#'>
+<html lang='en' prefix='og: http://ogp.me/ns# article: http://ogp.me/ns/article#'>
 <head>
 	<meta charset='utf-8'>
 	<meta name='viewport' content='width=device-width,initial-scale=1.0'>
