diff --git a/CHANGELOG.md b/CHANGELOG.md
index e9115e8..4744328 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+v4.2.2
+
+* Fix CryptoRNG on Web generating a random number 0 always
+* Add NoDashes support to the validator so that it validates UUIDs that don't have dashes but are otherwise valid.
+
 v4.2.1
 
 * Lower `meta` dependency to 1.9.1 so that it is compatible with Flutter Stable 3.13
diff --git a/lib/rng.dart b/lib/rng.dart
index 5233f11..f008fb8 100644
--- a/lib/rng.dart
+++ b/lib/rng.dart
@@ -53,7 +53,7 @@ class CryptoRNG extends RNG {
     final b = Uint8List(16);
 
     for (var i = 0; i < 16; i += 4) {
-      var k = _secureRandom.nextInt(1 << 32);
+      var k = _secureRandom.nextInt(pow(2, 32).toInt());
       b[i] = k;
       b[i + 1] = k >> 8;
       b[i + 2] = k >> 16;
diff --git a/lib/uuid.dart b/lib/uuid.dart
index a776c4f..e826180 100644
--- a/lib/uuid.dart
+++ b/lib/uuid.dart
@@ -128,11 +128,13 @@ class Uuid {
   static bool isValidUUID(
       {String fromString = '',
       Uint8List? fromByteList,
-      ValidationMode validationMode = ValidationMode.strictRFC4122}) {
+      ValidationMode validationMode = ValidationMode.strictRFC4122,
+      bool noDashes = false}) {
     return UuidValidation.isValidUUID(
         fromString: fromString,
         fromByteList: fromByteList,
-        validationMode: validationMode);
+        validationMode: validationMode,
+        noDashes: noDashes);
   }
 
   /// Generates a time-based version 1 UUID
diff --git a/lib/validation.dart b/lib/validation.dart
index c28601e..18ed3ee 100644
--- a/lib/validation.dart
+++ b/lib/validation.dart
@@ -10,7 +10,8 @@ class UuidValidation {
   static bool isValidUUID(
       {String fromString = '',
       Uint8List? fromByteList,
-      ValidationMode validationMode = ValidationMode.strictRFC4122}) {
+      ValidationMode validationMode = ValidationMode.strictRFC4122,
+      bool noDashes = false}) {
     if (fromByteList != null) {
       fromString = UuidParsing.unparse(fromByteList);
     }
@@ -20,7 +21,12 @@ class UuidValidation {
     }
 
     // If its not 36 characters in length, don't bother (including dashes).
-    if (fromString.length != 36) {
+    if (!noDashes && fromString.length != 36) {
+      return false;
+    }
+
+    // If its not 32 characters in length, don't bother (excluding excluding).
+    if (noDashes && fromString.length != 32) {
       return false;
     }
 
@@ -28,16 +34,18 @@ class UuidValidation {
     switch (validationMode) {
       case ValidationMode.strictRFC4122:
         {
-          const pattern =
-              r'^[0-9a-f]{8}-[0-9a-f]{4}-[0-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$';
+          var pattern = (noDashes)
+              ? r'^[0-9a-f]{8}-?[0-9a-f]{4}-?[0-8][0-9a-f]{3}-?[89ab][0-9a-f]{3}-?[0-9a-f]{12}$'
+              : r'^[0-9a-f]{8}-[0-9a-f]{4}-[0-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$';
           final regex = RegExp(pattern, caseSensitive: false, multiLine: true);
           final match = regex.hasMatch(fromString.toLowerCase());
           return match;
         }
       case ValidationMode.nonStrict:
         {
-          const pattern =
-              r'^[0-9a-f]{8}-[0-9a-f]{4}-[0-8][0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}$';
+          var pattern = (noDashes)
+              ? r'^[0-9a-f]{8}-?[0-9a-f]{4}-?[0-8][0-9a-f]{3}-?[0-9a-f]{4}-?[0-9a-f]{12}$'
+              : r'^[0-9a-f]{8}-[0-9a-f]{4}-[0-8][0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}$';
           final regex = RegExp(pattern, caseSensitive: false, multiLine: true);
           final match = regex.hasMatch(fromString.toLowerCase());
           return match;
@@ -60,11 +68,13 @@ class UuidValidation {
   static void isValidOrThrow(
       {String fromString = '',
       Uint8List? fromByteList,
-      ValidationMode validationMode = ValidationMode.strictRFC4122}) {
+      ValidationMode validationMode = ValidationMode.strictRFC4122,
+      bool noDashes = false}) {
     final isValid = isValidUUID(
         fromString: fromString,
         fromByteList: fromByteList,
-        validationMode: validationMode);
+        validationMode: validationMode,
+        noDashes: noDashes);
 
     if (!isValid) {
       // let's check if it is a non RFC4122 uuid and help the developer
@@ -72,7 +82,8 @@ class UuidValidation {
         final isValidNonStrict = isValidUUID(
             fromString: fromString,
             fromByteList: fromByteList,
-            validationMode: ValidationMode.nonStrict);
+            validationMode: ValidationMode.nonStrict,
+            noDashes: noDashes);
 
         if (isValidNonStrict) {
           throw FormatException(
diff --git a/pubspec.yaml b/pubspec.yaml
index 0e62637..d858276 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: uuid
-version: 4.2.1
+version: 4.2.2
 description: >
   RFC4122 (v1, v4, v5, v6, v7, v8) UUID Generator and Parser for Dart
 documentation: https://daegalus.github.io/dart-uuid/index.html
diff --git a/test/uuid_test.dart b/test/uuid_test.dart
index a55b167..cbda671 100644
--- a/test/uuid_test.dart
+++ b/test/uuid_test.dart
@@ -510,6 +510,20 @@ void main() {
     });
   });
 
+  group('[Validation Test]', () {
+    test('Dashes UUID', () {
+      const validUUID = '87cd4eb3-cb88-449b-a1da-e468fd829310';
+      expect(Uuid.isValidUUID(fromString: validUUID, noDashes: true), false);
+      expect(Uuid.isValidUUID(fromString: validUUID), true);
+    });
+    test('No Dashes UUID', () {
+      const validNoDashesUUID = '87cd4eb3cb88449ba1dae468fd829310';
+      expect(Uuid.isValidUUID(fromString: validNoDashesUUID, noDashes: true),
+          true);
+      expect(Uuid.isValidUUID(fromString: validNoDashesUUID), false);
+    });
+  });
+
   group('[Test Vectors]', () {
     group('[UUID6]', () {
       for (final testCase in {