diff --git a/package.json b/package.json
index 8460134..ce10d39 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,9 @@
     "test:coverage": "jest --coverage",
     "test:watch": "jest --watch"
   },
-  "dependencies": {},
+  "dependencies": {
+    "@material-ui/styles": "^4.11.5"
+  },
   "peerDependencies": {
     "mirador": "^3.0.0-rc.4",
     "react": "16.x",