diff --git a/package.json b/package.json
index bd4c1115..0868b71f 100644
--- a/package.json
+++ b/package.json
@@ -79,5 +79,8 @@
     "rimraf": "^2.4.3",
     "source-map-loader": "^0.1.5",
     "webpack": "^1.12.14"
+  },
+  "optionalDependencies": {
+    "olm": "https://matrix.org/packages/npm/olm/olm-0.1.0.tgz"
   }
 }