diff --git a/src/index.js b/src/index.js
index 9a97040..8b76875 100644
--- a/src/index.js
+++ b/src/index.js
@@ -2,6 +2,7 @@ const mc = require('minecraft-protocol')
 const EventEmitter = require('events').EventEmitter
 const path = require('path')
 const requireIndex = require('./lib/requireindex')
+const supportedVersions = require('./lib/version').supportedVersions
 require('emit-then').register()
 if (process.env.NODE_ENV === 'dev') {
   require('longjohn')
@@ -31,6 +32,12 @@ class MCServer extends EventEmitter {
   }
 
   connect (options) {
+    const version = require('minecraft-data')(options.version).version
+    if (supportedVersions.indexOf(version.majorVersion) === -1) {
+      throw new Error(`Version ${version.minecraftVersion} is not supported.`)
+    }
+    this.majorVersion = version.majorVersion
+
     const plugins = requireIndex(path.join(__dirname, 'lib', 'plugins'))
     this._server = mc.createServer(options)
     Object.keys(plugins)
diff --git a/src/lib/plugins/world.js b/src/lib/plugins/world.js
index acdde04..e5f5cb7 100644
--- a/src/lib/plugins/world.js
+++ b/src/lib/plugins/world.js
@@ -82,14 +82,21 @@ module.exports.server = async function (serv, {version, worldFolder, generation
 module.exports.player = function (player, serv, settings) {
   player.unloadChunk = (chunkX, chunkZ) => {
     delete player.loadedChunks[chunkX + ',' + chunkZ]
-    player._client.write('map_chunk', {
-      x: chunkX,
-      z: chunkZ,
-      groundUp: true,
-      bitMap: 0x0000,
-      chunkData: Buffer.alloc(0),
-      blockEntities: []
-    })
+
+    if (serv.majorVersion === '1.8') {
+      player._client.write('map_chunk', {
+        x: chunkX,
+        z: chunkZ,
+        groundUp: true,
+        bitMap: 0x0000,
+        chunkData: Buffer.alloc(0)
+      })
+    } else if (serv.majorVersion === '1.12') {
+      player._client.write('unload_chunk', {
+        chunkX,
+        chunkZ
+      })
+    }
   }
 
   player.sendChunk = (chunkX, chunkZ, column) => {
diff --git a/src/lib/version.js b/src/lib/version.js
new file mode 100644
index 0000000..b461809
--- /dev/null
+++ b/src/lib/version.js
@@ -0,0 +1,3 @@
+module.exports = {
+  supportedVersions: ['1.8', '1.12']
+}