diff --git a/js/index.js b/js/index.js
index f4b7eec..1f98d76 100644
--- a/js/index.js
+++ b/js/index.js
@@ -93,6 +93,18 @@ validateIban = (target) => {
   }
 }
 
+validateAmount = (target) => {
+  if (parseFloat(target.value) > 0) {
+    target.classList.remove("is-danger")
+    document.querySelector("#amount div span").innerHTML = "✅";
+
+    regenerate();
+  } else {
+    target.classList.add("is-danger")
+    document.querySelector("#amount div span").innerHTML = "❌";
+  }
+}
+
 validatePurpose = (target) => {
   const re = /[a-zA-Z0-9\/?:().,'+\- ]{1,140}/i;
 
@@ -106,7 +118,7 @@ validatePurpose = (target) => {
     regenerate();
   } else {
     target.classList.add("is-danger")
-    document.querySelector("#name div span").innerHTML = "❌";
+    document.querySelector("#purpose div span").innerHTML = "❌";
 
     if (!document.querySelector("#purpose p")) {
       const help = document.createElement("p");
@@ -129,6 +141,10 @@ document.querySelector("#bic input").addEventListener("input", (event) => {
   validateBic(event.target);
 });
 
+document.querySelector("#amount input").addEventListener("input", (event) => {
+  validateAmount(event.target);
+});
+
 document.querySelector("#purpose input").addEventListener("input", (event) => {
   validatePurpose(event.target);
 });