diff --git a/src/createServer.js b/src/createServer.js
index 8de0b0b..7714208 100644
--- a/src/createServer.js
+++ b/src/createServer.js
@@ -26,6 +26,7 @@ function createServer (options = {}) {
   const optVersion = version === undefined || version === false ? require('./version').defaultVersion : version
 
   const mcData = require('minecraft-data')(optVersion)
+  if (!mcData) throw new Error(`unsupported protocol version: ${optVersion}`)
   const mcversion = mcData.version
   const hideErrors = options.hideErrors || false