diff --git a/src/theme/book.css b/src/theme/book.css
index 6013ab1b22..493dfdf680 100644
--- a/src/theme/book.css
+++ b/src/theme/book.css
@@ -1,5 +1,5 @@
 html {
-  font-family: "Open Sans", sans-serif;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
   color: #333;
 }
 body {
@@ -8,7 +8,7 @@ body {
   overflow-x: hidden;
 }
 code {
-  font-family: "Source Code Pro", Consolas, "Ubuntu Mono", Menlo, "DejaVu Sans Mono", monospace, monospace;
+  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
   font-size: 0.875em;
 }
 .left {
diff --git a/src/theme/index.hbs b/src/theme/index.hbs
index 0e5fa009a1..8e4dd8f5be 100644
--- a/src/theme/index.hbs
+++ b/src/theme/index.hbs
@@ -12,8 +12,6 @@
         <base href="{{ path_to_root }}">
 
         <link rel="stylesheet" href="book.css">
-        <link href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet" type="text/css">
-        <link href="https://fonts.googleapis.com/css?family=Source+Code+Pro:500" rel="stylesheet" type="text/css">
 
         <link rel="shortcut icon" href="{{ favicon }}">
 
diff --git a/src/theme/stylus/general.styl b/src/theme/stylus/general.styl
index ead07bf30b..a1d91a50e5 100644
--- a/src/theme/stylus/general.styl
+++ b/src/theme/stylus/general.styl
@@ -1,6 +1,6 @@
 html {
-    font-family: "Open Sans", sans-serif
-    color: #333
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
+    color: #333;
 }
 
 body {
@@ -10,7 +10,7 @@ body {
 }
 
 code {
-    font-family: "Source Code Pro", Consolas, "Ubuntu Mono", Menlo, "DejaVu Sans Mono", monospace, monospace;
+    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
     font-size: 0.875em;
 }