diff --git a/donations/donations.php b/donations/donations.php
index 740b21e..c5ed78d 100644
--- a/donations/donations.php
+++ b/donations/donations.php
@@ -29,7 +29,7 @@ function forwardToDonationPage($amount){
 }
 
 $amount = (float)($_GET["amount"]);
-if(is_numeric($amount)) {
+if(is_numeric($amount) && $amount > 0) {
     forwardToDonationPage($amount);
 } else {
     echo "invalid amount!";