diff --git a/database/migrations/2016_06_01_000001_create_oauth_auth_codes_table.php b/database/migrations/2016_06_01_000001_create_oauth_auth_codes_table.php
index 8d12c4707..8fda427cc 100644
--- a/database/migrations/2016_06_01_000001_create_oauth_auth_codes_table.php
+++ b/database/migrations/2016_06_01_000001_create_oauth_auth_codes_table.php
@@ -15,7 +15,7 @@ public function up()
     {
         Schema::create('oauth_auth_codes', function (Blueprint $table) {
             $table->string('id', 100)->primary();
-            $table->integer('user_id');
+            $table->bigInteger('user_id');
             $table->unsignedInteger('client_id');
             $table->text('scopes')->nullable();
             $table->boolean('revoked');
diff --git a/database/migrations/2016_06_01_000002_create_oauth_access_tokens_table.php b/database/migrations/2016_06_01_000002_create_oauth_access_tokens_table.php
index bf529834b..a7156d4a0 100644
--- a/database/migrations/2016_06_01_000002_create_oauth_access_tokens_table.php
+++ b/database/migrations/2016_06_01_000002_create_oauth_access_tokens_table.php
@@ -15,7 +15,7 @@ public function up()
     {
         Schema::create('oauth_access_tokens', function (Blueprint $table) {
             $table->string('id', 100)->primary();
-            $table->integer('user_id')->index()->nullable();
+            $table->bigInteger('user_id')->index()->nullable();
             $table->unsignedInteger('client_id');
             $table->string('name')->nullable();
             $table->text('scopes')->nullable();
diff --git a/database/migrations/2016_06_01_000004_create_oauth_clients_table.php b/database/migrations/2016_06_01_000004_create_oauth_clients_table.php
index b411fdf04..ad55bee25 100644
--- a/database/migrations/2016_06_01_000004_create_oauth_clients_table.php
+++ b/database/migrations/2016_06_01_000004_create_oauth_clients_table.php
@@ -15,7 +15,7 @@ public function up()
     {
         Schema::create('oauth_clients', function (Blueprint $table) {
             $table->increments('id');
-            $table->integer('user_id')->index()->nullable();
+            $table->bigInteger('user_id')->index()->nullable();
             $table->string('name');
             $table->string('secret', 100);
             $table->text('redirect');