diff --git a/package.json b/package.json
index 8697a4051d1..225e53355c3 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,6 @@
     "@matrix-org/olm": "https://gitlab.matrix.org/api/v4/projects/27/packages/npm/@matrix-org/olm/-/@matrix-org/olm-3.2.3.tgz",
     "browser-request": "^0.3.3",
     "gfm.css": "^1.1.2",
-    "highlight.js": "^11.3.1",
     "jsrsasign": "^10.2.0",
     "katex": "^0.12.0",
     "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
diff --git a/src/vector/index.ts b/src/vector/index.ts
index 98e692606f7..6fcea1410dd 100644
--- a/src/vector/index.ts
+++ b/src/vector/index.ts
@@ -22,7 +22,6 @@ limitations under the License.
 // Our own CSS (which is themed) is imported via separate webpack entry points
 // in webpack.config.js
 require('gfm.css/gfm.css');
-require('highlight.js/styles/github.css');
 require('katex/dist/katex.css');
 
 /**