diff --git a/server/server b/server/server
index 2b8a101..67e2b67 100755
--- a/server/server
+++ b/server/server
@@ -169,8 +169,8 @@ $server->addMessageHandler('text', function (ConnectionInterface $from, array $d
 });
 
 $server->addMessageHandler('screenshot', function (ConnectionInterface $from, array $data) use ($shell, $messageOutput) {
-    $tmpFilename = sprintf('%s.jpg', tempnam('/tmp', 'remote_i3wm_ws'));
-    $shell->exec('import -window root -quality 10 -display :0 %s', $tmpFilename);
+    $tmpFilename = sprintf('%s/remote_i3wm_ws_screenshot.jpg', sys_get_temp_dir());
+    $shell->exec('import -window root -quality 10 -display :0 %1$s && chmod 600 %1$s', $tmpFilename);
 
     if (file_exists($tmpFilename)) {
         $base64 = base64_encode(file_get_contents($tmpFilename));