diff --git a/web/src/views/PlayGroundView.vue b/web/src/views/PlayGroundView.vue
index e8332746..dca632de 100644
--- a/web/src/views/PlayGroundView.vue
+++ b/web/src/views/PlayGroundView.vue
@@ -137,7 +137,7 @@ export default {
   mounted() {
     const text_element = document.getElementById('text_element');
     text_element.addEventListener('input', () => {
-      this.cursorPosition = text_element.selectionStart+1;
+      this.cursorPosition = text_element.selectionStart;
     });    
     text_element.addEventListener('click', () => {
       this.cursorPosition = text_element.selectionStart;