diff --git a/webpack.config.js b/webpack.config.js
index 23db22890b..b61a3e952f 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -41,6 +41,9 @@ module.exports = (env, argv) => {
             "jitsi": "./src/vector/jitsi/index.ts",
             "usercontent": "./node_modules/matrix-react-sdk/src/usercontent/index.js",
 
+            // CSS for math outout
+            "katex": "./node_modules/matrix-react-sdk/node_modules/katex/dist/katex.min.css",
+
             // CSS themes
             "theme-legacy": "./node_modules/matrix-react-sdk/res/themes/legacy-light/css/legacy-light.scss",
             "theme-legacy-dark": "./node_modules/matrix-react-sdk/res/themes/legacy-dark/css/legacy-dark.scss",