diff --git a/static/js/cours.js b/static/js/cours.js
index 7da4a7e..e4ebff3 100644
--- a/static/js/cours.js
+++ b/static/js/cours.js
@@ -165,3 +165,8 @@ window.addEventListener("load", () => {
     svgDarkTheme();
   }
 });
+
+// Is this working?
+window
+  .matchMedia("(prefers-color-scheme: dark)")
+  .addEventListener("change", svgDarkTheme);