diff --git a/src/_h5ai/client/css/styles.less b/src/_h5ai/client/css/styles.less
index 686745c9..0bc46a8a 100644
--- a/src/_h5ai/client/css/styles.less
+++ b/src/_h5ai/client/css/styles.less
@@ -31,4 +31,4 @@
 
 @import "lib/h5bp-main-footer";
 
-@import url(http://fonts.googleapis.com/css?family=Roboto:300,400,700);
+@import url(//fonts.googleapis.com/css?family=Roboto:300,400,700);