diff --git a/static/html/epub.html b/static/html/epub.html
index fc96f8b..b7f51da 100644
--- a/static/html/epub.html
+++ b/static/html/epub.html
@@ -94,7 +94,7 @@
 
         <script src="/static/epub.js/js/libs/jquery.min.js"></script>
         <script src="/static/epub.js/js/libs/zip.min.js"></script>
-        <script src="/static/reader/epub.js"></script>
+        <script src="/static/reader/epub.js?2"></script>
         <!-- Render -->
         <script src="/static/epub.js/js/epub.js"></script>
         <!-- Reader -->
diff --git a/static/html/pdf.html b/static/html/pdf.html
index 2fcf5e8..2fa74ea 100644
--- a/static/html/pdf.html
+++ b/static/html/pdf.html
@@ -53,8 +53,8 @@ See https://github.com/adobe-type-tools/cmap-resources
 <!--
     <script src="/static/pdf.js/debugger.js"></script>
     -->
-    <script src="/static/pdf.js/viewer.js"></script>
-    <script src="/static/reader/pdf.js"></script>
+    <script src="/static/pdf.js/viewer.js?2"></script>
+    <script src="/static/reader/pdf.js?2"></script>
 
   </head>
 
diff --git a/static/reader/epub.js b/static/reader/epub.js
index dbc013d..08f209d 100644
--- a/static/reader/epub.js
+++ b/static/reader/epub.js
@@ -3,6 +3,7 @@ var reader;
 var id = document.location.pathname.split('/')[1];
 var annotations = JSON.parse(localStorage[id + '.annotations'] || '[]')
 var currentSelection;
+var fontSize = parseInt(localStorage.epubFontSize || '100', 10)
 
 function saveAnnotations() {
     localStorage[id + '.annotations'] = JSON.stringify(annotations)
@@ -42,6 +43,7 @@ document.onreadystatechange = function () {
         var rendition = reader.rendition,
             book = reader.book;
 
+        rendition.themes.fontSize(fontSize + "%");
         annotations.forEach(function(a) {
             rendition.annotations.highlight(a.cfiRange, a.data || {}, onHighlightClicked);
         })
@@ -79,6 +81,23 @@ document.onreadystatechange = function () {
                     currentSelection = null
                 }
             }
+            if (event.keyCode == 61 && event.shiftKey) {
+                fontSize += 10
+                rendition.themes.fontSize(fontSize + "%");
+                localStorage.epubFontSize = fontSize
+                event.preventDefault()
+            } else if (event.keyCode == 173 && event.shiftKey) {
+                fontSize -= 10
+                rendition.themes.fontSize(fontSize + "%");
+                localStorage.epubFontSize = fontSize
+                event.preventDefault()
+            } else if (event.keyCode == 48 && event.shiftKey) {
+                fontSize = 100
+                rendition.themes.fontSize(fontSize + "%");
+                localStorage.epubFontSize = fontSize
+                event.preventDefault()
+            }
+            console.log(fontSize)
         })
         rendition.on("mark", function(cfiRange, contents) {
             console.log('!! mark', cfiRange)