diff --git a/lib/utils/util.js b/lib/utils/util.js
index b3e06c99..de51b19e 100644
--- a/lib/utils/util.js
+++ b/lib/utils/util.js
@@ -429,7 +429,7 @@ const Util = {
                 return str;
             },
             'tex': () => {
-                const texStr = str.replace('%', '\\\\%');
+                const texStr = str.replace(/%/g, '\\\\%');
                 if (status === 'low') {
                     return `$\\color{red}{\\textsf{${texStr}}}$`;
                 }