diff --git a/source/package.json b/source/package.json
index cf8b4e0..15210b9 100644
--- a/source/package.json
+++ b/source/package.json
@@ -2,7 +2,7 @@
     "name": "com.james-frowen.simplewebtransport",
     "displayName": "Simple Web Transport",
     "version": "2.0.0",
-    "unity": "2019.4",
+    "unity": "2021.3",
     "description": "Low level transport for Unity using the websocket Protocol. Includes a Websocket server, standalone client, and a WebGL client so that both your Server and Client can be build with Unity.",
     "author": "James Frowen",
     "repository": {
@@ -11,4 +11,4 @@
     },
     "dependencies": {},
     "samples": []
-}
+}
\ No newline at end of file