diff --git a/browser/js/simple-code-editor.js b/browser/js/simple-code-editor.js
index d11e025..634263d 100644
--- a/browser/js/simple-code-editor.js
+++ b/browser/js/simple-code-editor.js
@@ -210,6 +210,7 @@ const CodeEditor = {
     highlight: {
       mounted(el, binding) {
         el.textContent = binding.value;
+        el.removeAttribute('data-highlighted');
         hljs.highlightElement(el);
       },
       updated(el, binding) {
@@ -217,6 +218,7 @@ const CodeEditor = {
           el.scrolling = false;
         } else {
           el.textContent = binding.value;
+          el.removeAttribute('data-highlighted');
           hljs.highlightElement(el);
         }
       },
diff --git a/npm-package/CodeEditor.vue b/npm-package/CodeEditor.vue
index efd6c4b..655de73 100644
--- a/npm-package/CodeEditor.vue
+++ b/npm-package/CodeEditor.vue
@@ -216,6 +216,7 @@ export default {
     highlight: {
       mounted(el, binding) {
         el.textContent = binding.value;
+        el.removeAttribute('data-highlighted');
         hljs.highlightElement(el);
       },
       updated(el, binding) {
@@ -223,6 +224,7 @@ export default {
           el.scrolling = false;
         } else {
           el.textContent = binding.value;
+          el.removeAttribute('data-highlighted');
           hljs.highlightElement(el);
         }
       },
diff --git a/website/src/SimpleCodeEditor/CodeEditor.vue b/website/src/SimpleCodeEditor/CodeEditor.vue
index efd6c4b..655de73 100644
--- a/website/src/SimpleCodeEditor/CodeEditor.vue
+++ b/website/src/SimpleCodeEditor/CodeEditor.vue
@@ -216,6 +216,7 @@ export default {
     highlight: {
       mounted(el, binding) {
         el.textContent = binding.value;
+        el.removeAttribute('data-highlighted');
         hljs.highlightElement(el);
       },
       updated(el, binding) {
@@ -223,6 +224,7 @@ export default {
           el.scrolling = false;
         } else {
           el.textContent = binding.value;
+          el.removeAttribute('data-highlighted');
           hljs.highlightElement(el);
         }
       },