diff --git a/package.json b/package.json
index 86dcfaccfe..0b5a18168f 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "filesize": "^3.1.2",
     "flux": "^2.0.3",
     "glob": "^5.0.14",
+    "highlight.js": "^8.9.1",
     "linkifyjs": "^2.0.0-beta.4",
     "marked": "^0.3.5",
     "matrix-js-sdk": "https://github.com/matrix-org/matrix-js-sdk.git#develop",
@@ -30,6 +31,7 @@
     "q": "^1.4.1",
     "react": "^0.14.2",
     "react-dom": "^0.14.2",
+    "sanitize-html": "^1.11.1",
     "velocity-animate": "^1.2.3"
   },
   "//deps": "The loader packages are here because webpack in a project that depends on us needs them in this package's node_modules folder",