diff --git a/src/Domain/Event/Subscriber.php b/src/Domain/Event/Subscriber.php
index a5aeddc7..03a3278b 100644
--- a/src/Domain/Event/Subscriber.php
+++ b/src/Domain/Event/Subscriber.php
@@ -34,7 +34,7 @@ class Subscriber implements Listener
 
     public function __construct(Event\Listener\Factory $listenerFactory, Event\Subscription\Factory $subscriptionFactory, Event\Subscription\Repository $subscriptionsRepository, UnitOfWork $uow) // TODO: GET RID OF UOW FROM HERE!
     {
-        $this->uuid = Domain\Id\UUID::create();
+        $this->uuid = Domain\Id\UUID4::create();
         $this->listenerFactory = $listenerFactory;
         $this->subscriptionFactory = $subscriptionFactory;
         $this->subscriptionsRepository = $subscriptionsRepository;
diff --git a/src/Domain/Id/UUID.php b/src/Domain/Id/UUID.php
index c28c2859..b5174e5a 100644
--- a/src/Domain/Id/UUID.php
+++ b/src/Domain/Id/UUID.php
@@ -16,13 +16,9 @@
 use Streak\Domain;
 
 /**
- * UUID v4.
- *
  * @author Alan Gabriel Bem <alan.bem@gmail.com>
- *
- * @see https://gist.github.com/tdomarkas/c5fbc10385ae004cbde6
  */
-class UUID implements Domain\Id
+abstract class UUID implements Domain\Id
 {
     private $value;
 
@@ -46,14 +42,7 @@ final public function __construct(string $value)
         $this->value = $value;
     }
 
-    public static function create()
-    {
-        $uuid = \Ramsey\Uuid\Uuid::uuid4()->toString();
-
-        return new static($uuid);
-    }
-
-    public function equals($uuid) : bool
+    final public function equals($uuid) : bool
     {
         if (!$uuid instanceof self) {
             return false;
@@ -66,13 +55,13 @@ public function equals($uuid) : bool
         return true;
     }
 
-    public function toString() : string
+    final public function toString() : string
     {
         return $this->value;
     }
 
-    public static function fromString(string $uuid) : Domain\Id
+    final public static function fromString(string $uuid) : Domain\Id
     {
-        return new self($uuid);
+        return new static($uuid);
     }
 }
diff --git a/src/Domain/Id/UUID3.php b/src/Domain/Id/UUID3.php
new file mode 100644
index 00000000..29929f0c
--- /dev/null
+++ b/src/Domain/Id/UUID3.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * This file is part of the streak package.
+ *
+ * (C) Alan Gabriel Bem <alan.bem@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Streak\Domain\Id;
+
+/**
+ * UUID v3.
+ *
+ * @author Alan Gabriel Bem <alan.bem@gmail.com>
+ */
+abstract class UUID3 extends UUID
+{
+    /**
+     * Generates deterministic UUID based on MD5 of static namespace (also UUID) and name.
+     *
+     * Use it only if backward compatibility with e.g. outside system is required, use v5 otherwise.
+     *
+     * @param string $name
+     *
+     * @return static
+     */
+    final public static function create(string $name)
+    {
+        $uuid = \Ramsey\Uuid\Uuid::uuid3(self::namespace()->toString(), $name)->toString();
+
+        return new static($uuid);
+    }
+
+    /**
+     * Namespace UUID required for UUID v5 generation.
+     *
+     * @return UUID
+     */
+    abstract protected static function namespace() : UUID;
+}
diff --git a/src/Domain/Id/UUID4.php b/src/Domain/Id/UUID4.php
new file mode 100644
index 00000000..bdab83a7
--- /dev/null
+++ b/src/Domain/Id/UUID4.php
@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * This file is part of the streak package.
+ *
+ * (C) Alan Gabriel Bem <alan.bem@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Streak\Domain\Id;
+
+/**
+ * UUID v4.
+ *
+ * @author Alan Gabriel Bem <alan.bem@gmail.com>
+ */
+class UUID4 extends UUID
+{
+    /**
+     * Generates (pseudo-)random UUID.
+     *
+     * @return UUID4
+     */
+    final public static function create()
+    {
+        $uuid = \Ramsey\Uuid\Uuid::uuid4()->toString();
+
+        return new static($uuid);
+    }
+}
diff --git a/src/Domain/Id/UUID5.php b/src/Domain/Id/UUID5.php
new file mode 100644
index 00000000..36ad8647
--- /dev/null
+++ b/src/Domain/Id/UUID5.php
@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * This file is part of the streak package.
+ *
+ * (C) Alan Gabriel Bem <alan.bem@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Streak\Domain\Id;
+
+/**
+ * UUID v5.
+ *
+ * @author Alan Gabriel Bem <alan.bem@gmail.com>
+ */
+abstract class UUID5 extends UUID
+{
+    /**
+     * Generates deterministic UUID based on SHA1 of static namespace (also UUID) and name.
+     *
+     * @param string $name
+     *
+     * @return static
+     */
+    final public static function create(string $name)
+    {
+        $uuid = \Ramsey\Uuid\Uuid::uuid5(self::namespace()->toString(), $name)->toString();
+
+        return new static($uuid);
+    }
+
+    /**
+     * Namespace UUID required for UUID v5 generation.
+     *
+     * @return UUID
+     */
+    abstract protected static function namespace() : UUID;
+}
diff --git a/src/Infrastructure/EventStore/InMemoryEventStore.php b/src/Infrastructure/EventStore/InMemoryEventStore.php
index ecab94aa..d0043280 100644
--- a/src/Infrastructure/EventStore/InMemoryEventStore.php
+++ b/src/Infrastructure/EventStore/InMemoryEventStore.php
@@ -78,7 +78,7 @@ public function add(Domain\Id $producerId, ?int $version, Event ...$events) : vo
                 throw new Exception\EventAlreadyInStore($event);
             }
 
-            $uuid = Domain\Id\UUID::create()->toString();
+            $uuid = Domain\Id\UUID4::create()->toString();
 
             if (!isset($this->streams[$stream])) {
                 $this->streams[$stream] = [];
diff --git a/src/Infrastructure/EventStore/PDOPostgresEventStore.php b/src/Infrastructure/EventStore/PDOPostgresEventStore.php
index eb7de932..61969329 100644
--- a/src/Infrastructure/EventStore/PDOPostgresEventStore.php
+++ b/src/Infrastructure/EventStore/PDOPostgresEventStore.php
@@ -19,6 +19,7 @@
 use Streak\Domain\EventStore;
 use Streak\Domain\Exception;
 use Streak\Domain\Id\UUID;
+use Streak\Domain\Id\UUID4;
 
 /**
  * @author Alan Gabriel Bem <alan.bem@gmail.com>
@@ -147,7 +148,7 @@ public function add(Domain\Id $producerId, ?int $version, Event ...$events) : vo
                 throw new Exception\EventAlreadyInStore($event);
             }
 
-            $uuid = UUID::create();
+            $uuid = UUID4::create();
 
             $version = $this->bumpUp($version);
             $row = $this->toRow($producerId, $version, $uuid, $event);
@@ -199,7 +200,7 @@ public function add(Domain\Id $producerId, ?int $version, Event ...$events) : vo
             $sequence = (string) $returned['number'];
             $uuid = $returned['uuid'];
             $uuid = mb_strtoupper($uuid);
-            $uuid = new UUID($uuid);
+            $uuid = new UUID4($uuid);
             $metadata = $returned['metadata'];
             $metadata = json_decode($metadata, true);
             $metadata = Event\Metadata::fromArray($metadata);
diff --git a/tests/Infrastructure/UnitOfWorkTest.php b/tests/Infrastructure/UnitOfWorkTest.php
index bfe0edc4..53d842d1 100644
--- a/tests/Infrastructure/UnitOfWorkTest.php
+++ b/tests/Infrastructure/UnitOfWorkTest.php
@@ -16,7 +16,7 @@
 use PHPUnit\Framework\TestCase;
 use Streak\Domain\Event;
 use Streak\Domain\EventStore;
-use Streak\Domain\Id\UUID;
+use Streak\Domain\Id\UUID4;
 use Streak\Infrastructure\UnitOfWorkTest\NonVersionableEventSourcedStub;
 use Streak\Infrastructure\UnitOfWorkTest\VersionableEventSourcedStub;
 
@@ -70,10 +70,10 @@ public function setUp()
 
     public function testObject()
     {
-        $id1 = UUID::create();
-        $id2 = UUID::create();
-        $id3 = UUID::create();
-        $id4 = UUID::create();
+        $id1 = UUID4::create();
+        $id2 = UUID4::create();
+        $id3 = UUID4::create();
+        $id4 = UUID4::create();
 
         $object1 = new VersionableEventSourcedStub($id1, 0, $this->event1);
         $object2 = new VersionableEventSourcedStub($id2, 1, $this->event2);
@@ -165,8 +165,8 @@ public function testError()
     {
         $exception = new \RuntimeException();
 
-        $id1 = UUID::create();
-        $id2 = UUID::create();
+        $id1 = UUID4::create();
+        $id2 = UUID4::create();
         $object1 = new VersionableEventSourcedStub($id1, 0, $this->event1);
         $object2 = new VersionableEventSourcedStub($id2, 0, $this->event2);