1 files changed, 1 insertions, 1 deletions

diff --git a/graph.php b/graph.php
index 2c3f6e6..6206d73 100644
--- a/graph.php
+++ b/graph.php
@@ -35,7 +35,7 @@ if ($plugin == 'aggregation') {
 }
 
 # plugin json
-if (file_exists('plugin/'.$plugin.'.json')) {
+if (function_exists('json_decode') && file_exists('plugin/'.$plugin.'.json')) {
         $json = file_get_contents('plugin/'.$plugin.'.json');
         $plugin_json = json_decode($json, true);