diff --git a/.travis.yml b/.travis.yml
index 60eb53265..4e11ad58d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: php
 php:
 - '7.1'
 - '7.2'
+- '7.3'
 
 before_script:
 - "composer install"
diff --git a/composer.json b/composer.json
index 4dea81e69..23d4337ae 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,8 @@
   ],
   "require": {
     "php": "^7.1",
-    "laravel/framework": "~5.5.0|~5.6.0|~5.7.0"
+    "laravel/framework": "~5.5.0|~5.6.0|~5.7.0",
+    "ramsey/uuid": "^3.0"
   },
   "require-dev": {
     "doctrine/dbal": "^2.8",
diff --git a/src/Traits/HasWallet.php b/src/Traits/HasWallet.php
index ce63815ba..c85c76e0f 100644
--- a/src/Traits/HasWallet.php
+++ b/src/Traits/HasWallet.php
@@ -11,7 +11,7 @@
 use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Illuminate\Support\Collection;
 use Illuminate\Support\Facades\DB;
-use Illuminate\Support\Str;
+use Ramsey\Uuid\Uuid;
 
 /**
  * Class HasWallet
@@ -141,6 +141,7 @@ public function forceTransfer(Wallet $wallet, int $amount, ?array $meta = null):
      * @param Transaction $withdraw
      * @param Transaction $deposit
      * @return Transfer
+     * @throws
      */
     protected function assemble(Wallet $wallet, Transaction $withdraw, Transaction $deposit): Transfer
     {
@@ -154,7 +155,7 @@ protected function assemble(Wallet $wallet, Transaction $withdraw, Transaction $
             'from_id' => $this->getKey(),
             'to_type' => $wallet->getMorphClass(),
             'to_id' => $wallet->getKey(),
-            'uuid' => Str::uuid()->toString(),
+            'uuid' => Uuid::uuid4()->toString(),
         ]);
     }
 
@@ -163,6 +164,7 @@ protected function assemble(Wallet $wallet, Transaction $withdraw, Transaction $
      * @param array|null $meta
      * @param bool $confirmed
      * @return Transaction
+     * @throws
      */
     protected function change(int $amount, ?array $meta, bool $confirmed): Transaction
     {
@@ -172,7 +174,7 @@ protected function change(int $amount, ?array $meta, bool $confirmed): Transacti
             'type' => $amount > 0 ? 'deposit' : 'withdraw',
             'payable_type' => $this->getMorphClass(),
             'payable_id' => $this->getKey(),
-            'uuid' => Str::uuid()->toString(),
+            'uuid' => Uuid::uuid4()->toString(),
             'confirmed' => $confirmed,
             'amount' => $amount,
             'meta' => $meta,