diff --git a/ext/static_files/script.js b/ext/static_files/script.js
index 466032b7..ac7273dd 100644
--- a/ext/static_files/script.js
+++ b/ext/static_files/script.js
@@ -77,10 +77,10 @@ $(document).ready(function() {
     $(document).keyup(function(e) {
         if($(e.target).is('input,textarea')){ return; }
         if (e.metaKey || e.ctrlKey || e.altKey || e.shiftKey) { return; }
-        if (e.keyCode == 37 && $("[rel='previous']").length) {
+        if (e.keyCode === 37 && $("[rel='previous']").length) {
             window.location.href = $("[rel='previous']").attr("href");
         }
-        else if (e.keyCode == 39 && $("[rel='next']").length) {
+        else if (e.keyCode === 39 && $("[rel='next']").length) {
             window.location.href = $("[rel='next']").attr("href");
         }
     });