diff --git a/src/theme/book.css b/src/theme/book.css
index 086bd78f..e8edd0b5 100644
--- a/src/theme/book.css
+++ b/src/theme/book.css
@@ -1,6 +1,9 @@
 html {
   font-family: "Open Sans", sans-serif;
   color: #333;
+  -webkit-text-size-adjust: none;
+  -ms-text-size-adjust: none;
+  text-size-adjust: none;
 }
 body {
   margin: 0;
diff --git a/src/theme/stylus/general.styl b/src/theme/stylus/general.styl
index 0420a862..e40745b6 100644
--- a/src/theme/stylus/general.styl
+++ b/src/theme/stylus/general.styl
@@ -1,6 +1,7 @@
 html {
     font-family: "Open Sans", sans-serif
     color: #333
+    text-size-adjust: none
 }
 
 body {