diff --git a/apps/cards/EAN13.js b/apps/cards/EAN13.js
index 01be1c8df..f04417b6a 100644
--- a/apps/cards/EAN13.js
+++ b/apps/cards/EAN13.js
@@ -24,7 +24,7 @@ class EAN13 extends EAN {
 
 	constructor(data, options) {
 		// Add checksum if it does not exist
-		if (data.search(/^[0-9]{12}$/) !== -1) {
+		if (/^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$/.test(data)) {
 			data += checksum(data);
 		}
 
@@ -36,7 +36,7 @@ class EAN13 extends EAN {
 
 	valid() {
 		return (
-			this.data.search(/^[0-9]{13}$/) !== -1 &&
+			/^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$/.test(this.data) &&
 			+this.data[12] === checksum(this.data)
 		);
 	}
diff --git a/apps/cards/EAN2.js b/apps/cards/EAN2.js
index c7ceb059b..840a98ce0 100644
--- a/apps/cards/EAN2.js
+++ b/apps/cards/EAN2.js
@@ -12,7 +12,7 @@ class EAN2 extends Barcode {
 	}
 
 	valid() {
-		return this.data.search(/^[0-9]{2}$/) !== -1;
+		return /^[0-9][0-9]$/.test(this.data);
 	}
 
 	encode(){
diff --git a/apps/cards/EAN5.js b/apps/cards/EAN5.js
index 77217cd95..241f422e1 100644
--- a/apps/cards/EAN5.js
+++ b/apps/cards/EAN5.js
@@ -24,7 +24,7 @@ class EAN5 extends Barcode {
 	}
 
 	valid() {
-		return this.data.search(/^[0-9]{5}$/) !== -1;
+		return /^[0-9][0-9][0-9][0-9][0-9]$/.test(this.data);
 	}
 
 	encode() {
diff --git a/apps/cards/EAN8.js b/apps/cards/EAN8.js
index 7ffb41c4c..abcf141fc 100644
--- a/apps/cards/EAN8.js
+++ b/apps/cards/EAN8.js
@@ -20,7 +20,7 @@ class EAN8 extends EAN {
 
 	constructor(data, options) {
 		// Add checksum if it does not exist
-		if (data.search(/^[0-9]{7}$/) !== -1) {
+		if (/^[0-9][0-9][0-9][0-9][0-9][0-9][0-9]$/.test(data)) {
 			data += checksum(data);
 		}
 
@@ -29,7 +29,7 @@ class EAN8 extends EAN {
 
 	valid() {
 		return (
-			this.data.search(/^[0-9]{8}$/) !== -1 &&
+			/^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$/.test(this.data) &&
 			+this.data[7] === checksum(this.data)
 		);
 	}
diff --git a/apps/cards/UPC.js b/apps/cards/UPC.js
index b7488b12c..dd18f25d9 100644
--- a/apps/cards/UPC.js
+++ b/apps/cards/UPC.js
@@ -7,7 +7,7 @@ const Barcode = require("cards.Barcode.js");
 class UPC extends Barcode{
 	constructor(data, options){
 		// Add checksum if it does not exist
-		if(data.search(/^[0-9]{11}$/) !== -1){
+		if(/^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$/.test(data)){
 			data += checksum(data);
 		}
 
@@ -15,7 +15,7 @@ class UPC extends Barcode{
 	}
 
 	valid(){
-		return this.data.search(/^[0-9]{12}$/) !== -1 &&
+		return /^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$/.test(this.data) &&
 			this.data[11] == checksum(this.data);
 	}
 
diff --git a/apps/cards/UPCE.js b/apps/cards/UPCE.js
index bd082dd4d..898abfad0 100644
--- a/apps/cards/UPCE.js
+++ b/apps/cards/UPCE.js
@@ -41,14 +41,14 @@ class UPCE extends Barcode{
 		// is a UPC-A check or number system digit.
 		super(data, options);
 		this.isValid = false;
-		if(data.search(/^[0-9]{6}$/) !== -1){
+		if(/^[0-9][0-9][0-9][0-9][0-9][0-9]$/.test(data)){
 			this.middleDigits = data;
 			this.upcA = expandToUPCA(data, "0");
 			this.text = options.text ||
 				`${this.upcA[0]}${data}${this.upcA[this.upcA.length - 1]}`;
 			this.isValid = true;
 		}
-		else if(data.search(/^[01][0-9]{7}$/) !== -1){
+		else if(/^[01][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$/.test(data)){
 			this.middleDigits = data.substring(1, data.length - 1);
 			this.upcA = expandToUPCA(this.middleDigits, data[0]);