diff --git a/_javascript/modules/components/mermaid.js b/_javascript/modules/components/mermaid.js
index 2b4759f4726..91df4f25497 100644
--- a/_javascript/modules/components/mermaid.js
+++ b/_javascript/modules/components/mermaid.js
@@ -11,7 +11,7 @@ function refreshTheme(event) {
     const mermaidList = document.getElementsByClassName(MERMAID);
 
     [...mermaidList].forEach((elem) => {
-      const svgCode = elem.previousSibling.children.item(0).innerHTML;
+      const svgCode = elem.previousSibling.children.item(0).textContent;
       elem.textContent = svgCode;
       elem.removeAttribute('data-processed');
     });