diff --git a/package.json b/package.json
index e633892..cbcb539 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
     "babel-preset-es2015": "^6.14.0",
     "babel-preset-react": "^6.11.1",
     "howler": "^2.0.1",
+    "js-base64": "^2.1.9",
     "react": "^15.3.2",
     "react-dom": "^15.3.2"
   },
diff --git a/src/Mine/SeekerBundle/Resources/public/js/mine-seeker/app.js b/src/Mine/SeekerBundle/Resources/public/js/mine-seeker/app.js
index f87ced3..d0d6a69 100644
--- a/src/Mine/SeekerBundle/Resources/public/js/mine-seeker/app.js
+++ b/src/Mine/SeekerBundle/Resources/public/js/mine-seeker/app.js
@@ -53,7 +53,7 @@ class MineSeeker extends React.Component {
             session
                 .call(
                     this.state.gameInherited ? "sample/connectGame" : "sample/startGame",
-                    this.state.gameInherited ? this.state.gameAssoc : [gridClient, this.state.gameAssoc]
+                    this.state.gameInherited ? this.state.gameAssoc : [Base64.encode(JSON.stringify(gridClient)), this.state.gameAssoc]
                 )
                 .then(
                     (gridServer) => {
@@ -63,7 +63,7 @@ class MineSeeker extends React.Component {
 
                         /** save session to GridControl */
                         this.refs.gridControl.setState({
-                            grid: this.state.gameInherited ? JSON.parse(gridServer) : gridClient,
+                            grid: this.state.gameInherited ? JSON.parse(Base64.decode(gridServer)) : gridClient,
                             session: this.state.session,
                             channel: this.state.channel
                         });
diff --git a/src/Mine/SeekerBundle/Resources/views/Game/play.html.twig b/src/Mine/SeekerBundle/Resources/views/Game/play.html.twig
index ac0027c..099bfb6 100644
--- a/src/Mine/SeekerBundle/Resources/views/Game/play.html.twig
+++ b/src/Mine/SeekerBundle/Resources/views/Game/play.html.twig
@@ -20,5 +20,6 @@
     {{ ws_client() }}
 
     <script type="text/javascript" src="{{ asset('node/howler/dist/howler.min.js') }}"></script>
+    <script type="text/javascript" src="{{ asset('node/js-base64/base64.min.js') }}"></script>
     <script type="text/javascript" src="{{ asset('js/index.js') }}"></script>
 {% endblock %}
diff --git a/src/Mine/SeekerBundle/Rpc/AcmeRpc.php b/src/Mine/SeekerBundle/Rpc/AcmeRpc.php
index cf85e8f..015a050 100644
--- a/src/Mine/SeekerBundle/Rpc/AcmeRpc.php
+++ b/src/Mine/SeekerBundle/Rpc/AcmeRpc.php
@@ -43,7 +43,7 @@ class AcmeRpc implements RpcInterface
      * @param ConnectionInterface $connection
      * @param WampRequest $request
      * @param array $params
-     * @return Grid
+     * @return boolean
      */
     public function startGame(ConnectionInterface $connection, WampRequest $request, array $params)
     {
@@ -58,7 +58,7 @@ class AcmeRpc implements RpcInterface
      */
     public function connectGame(ConnectionInterface $connection, WampRequest $request, array $params)
     {
-        return json_encode($this->getGrid($params), JSON_NUMERIC_CHECK);
+        return base64_encode(json_encode($this->getGrid($params), JSON_NUMERIC_CHECK));
     }
 
     /**
@@ -91,14 +91,14 @@ class AcmeRpc implements RpcInterface
 
     /**
      * @param $data
-     * @return Grid
+     * @return boolean
      */
     private function saveGrid($data)
     {
         $playedGame = new PlayedGame();
         $grid = new Grid();
 
-        foreach ($data[0] as $row) {
+        foreach (json_decode(base64_decode($data[0])) as $row) {
             $gridRow = new GridRow();
 
             foreach ($row as $col) {