diff --git a/aprendizations/templates/topic.html b/aprendizations/templates/topic.html
index 0e51ca3..efe604e 100644
--- a/aprendizations/templates/topic.html
+++ b/aprendizations/templates/topic.html
@@ -25,6 +25,7 @@
         }
       };
     </script>
+    <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
     <script async type="text/javascript" id="MathJax-script" src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
 
     <!-- codemirror -->
--
libgit2 0.21.2