diff --git a/package.json b/package.json
index ec911db..6f149d2 100644
--- a/package.json
+++ b/package.json
@@ -229,6 +229,6 @@
   },
   "optionalDependencies": {
     "jsbi": "^4.3.2",
-    "x11": "^2.3.0"
+    "x11": "^3.2.2"
   }
 }