diff --git a/model/CreditApi.class.php b/model/CreditApi.class.php
index 116d646e..8b7fafe5 100644
--- a/model/CreditApi.class.php
+++ b/model/CreditApi.class.php
@@ -21,7 +21,9 @@ class CreditApi
   {
     $rawJSON = file_get_contents('https://spreadsheets.google.com/feeds/cells/1iOC1o5jq_4ySwRzsy2tZPPltw6Tbky2e3lDFdsWV8dU/okf1n52/public/full/R1C1?alt=json');
     $json = $rawJSON ? json_decode($rawJSON, true) : [];
-    return isset($json['entry']) && isset($json['entry']['content']) ? $json['entry']['content']['$t'] : -1;
+    return isset($json['entry']) && isset($json['entry']['content']) && is_numeric($json['entry']['content']['$t'] ) ?
+              $json['entry']['content']['$t'] :
+              6687; //fallback #
   }
 
   public static function getCreditsPerDollar($days)