diff --git a/src/pyj/read_book/view.pyj b/src/pyj/read_book/view.pyj
index 30656f55a0..fc6483126e 100644
--- a/src/pyj/read_book/view.pyj
+++ b/src/pyj/read_book/view.pyj
@@ -17,7 +17,7 @@ LOADING_DOC = '''
 <!DOCTYPE html>
 <html>
 <head>
-<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <script type="text/javascript" id="bootstrap">
 __SCRIPT__
