diff --git a/comic_reader.js b/comic_reader.js
index 4ed0b74..a4427c6 100644
--- a/comic_reader.js
+++ b/comic_reader.js
@@ -281,14 +281,14 @@ function moveReader(to_next, move_page) {
 //   CALLBACKS
 // =============
 
-function handleKeyPress(key, has_ctrl){
+function handleKeyPress(key, has_shift){
     
     if (key == MOVE_NEXT) {
-        moveReader(true, has_ctrl)
+        moveReader(true, has_shift)
     }
     
     else if (key == MOVE_BACK) {
-        moveReader(false, has_ctrl)
+        moveReader(false, has_shift)
     }
     
     else if (key.toUpperCase() == TOGGLE_FULLSCREEN){
@@ -335,7 +335,7 @@ addEventListener("resize", (event) => {
 });
 
 addEventListener("keydown", (event) => {
-    handleKeyPress(event.key, event.ctrlKey)
+    handleKeyPress(event.key, event.shiftKey)
 });
 
 addEventListener("wheel", (event) => {
diff --git a/comic_reader_test_high_res.html b/comic_reader_test_high_res.html
index 435e548..0e98627 100644
--- a/comic_reader_test_high_res.html
+++ b/comic_reader_test_high_res.html
@@ -44,7 +44,7 @@
                     <div><div class="key">F</div>: Toggle fullscreen</div>
                     <div><div class="key">&larr;</div>/ scroll up / clic left : previous panel</div>
                     <div><div class="key">&rarr;</div>/ scroll down / clic center or right : next panel</div>
-                    <div><div class="key">CRTL</div> + <div class="key">&larr;</div>/<div class="key">&rarr;</div>: previous / next page</div>
+                    <div><div class="key">SHIFT</div> + <div class="key">&larr;</div>/<div class="key">&rarr;</div>: previous / next page</div>
                 </div>
             </div>
         </div>