diff --git a/web/app/views/page-header.php b/web/app/views/page-header.php
index e60c825..291d5cf 100644
--- a/web/app/views/page-header.php
+++ b/web/app/views/page-header.php
@@ -152,7 +152,7 @@
     			}
 			});
 		</script>
-		<script src="//cdn.bootcss.com/mathjax/2.7.7/MathJax.js?config=TeX-AMS_HTML"></script>
+		<script src="//cdn.staticfile.org/mathjax/2.7.7/MathJax.js?config=TeX-AMS_HTML"></script>
 		<?php endif ?>
 		
 		<?php if (isset($REQUIRE_LIB['jquery.form'])): ?>
diff --git a/web/app/views/slide.php b/web/app/views/slide.php
index 9104f81..1fc73b8 100644
--- a/web/app/views/slide.php
+++ b/web/app/views/slide.php
@@ -62,7 +62,7 @@
 				transition: 'slide',
 				
 				math: {
-					mathjax: '//cdn.bootcss.com/mathjax/2.6.0/MathJax.js',
+					mathjax: '//cdn.staticfile.org/mathjax/2.7.7/MathJax.js',
 					config: 'TeX-AMS_HTML-full'
 				},