diff --git a/index.php b/index.php
index acdd79d..90cf01d 100644
--- a/index.php
+++ b/index.php
@@ -72,7 +72,7 @@ $lateLoans = getLateLoans($pdo);
                 <br>
                 <label>Anzahl
                     <br>
-                    <input type="number" name="amount" value="1" required>
+                    <input type="number" name="amount" min="1" value="1" required>
                 </label>
                 <br>
                 <br>