diff --git a/app/Models/Wallet.php b/app/Models/Wallet.php
index 70542aad..9d897dee 100644
--- a/app/Models/Wallet.php
+++ b/app/Models/Wallet.php
@@ -6,6 +6,16 @@ use Illuminate\Database\Eloquent\Model;
 
 class Wallet extends Model
 {
+    /**
+     * @var string
+     */
+    protected $primaryKey = 'user_id';
+
+    /**
+     * @var bool
+     */
+    public $incrementing = false;
+
     /**
      * @var array
      */
@@ -17,7 +27,6 @@ class Wallet extends Model
      * @var array
      */
     protected $fillable = [
-        'user_id',
         'balance',
         'total_expenses',
         'total_revenue',
diff --git a/app/Models/WalletLog.php b/app/Models/WalletLog.php
index 56815e5a..a41b7b1c 100644
--- a/app/Models/WalletLog.php
+++ b/app/Models/WalletLog.php
@@ -2,10 +2,8 @@
 
 namespace App\Models;
 
-use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 
 class WalletLog extends Model
 {
-    use HasFactory;
 }
diff --git a/database/migrations/2021_12_23_171645_create_wallets_table.php b/database/migrations/2021_12_23_171645_create_wallets_table.php
index 09a1b3cd..23c85ee1 100644
--- a/database/migrations/2021_12_23_171645_create_wallets_table.php
+++ b/database/migrations/2021_12_23_171645_create_wallets_table.php
@@ -14,8 +14,7 @@ class CreateWalletsTable extends Migration
     public function up()
     {
         Schema::create('wallets', function (Blueprint $table) {
-            $table->id();
-            $table->unsignedBigInteger('user_id')->unique()->comment('用户ID');
+            $table->unsignedBigInteger('user_id')->primary()->comment('用户ID');
             $table->unsignedBigInteger('balance')->default(0)->comment('余额（分）');
             $table->unsignedBigInteger('total_expenses')->default(0)->comment('总支出（分）');
             $table->unsignedBigInteger('total_revenue')->default(0)->comment('总收入（分）');
diff --git a/database/migrations/2021_12_23_171714_create_wallet_logs_table.php b/database/migrations/2021_12_23_171714_create_wallet_logs_table.php
index e014d1e7..7bd4bd42 100644
--- a/database/migrations/2021_12_23_171714_create_wallet_logs_table.php
+++ b/database/migrations/2021_12_23_171714_create_wallet_logs_table.php
@@ -16,7 +16,6 @@ class CreateWalletLogsTable extends Migration
         Schema::create('wallet_logs', function (Blueprint $table) {
             $table->id();
             $table->unsignedBigInteger('user_id')->comment('用户ID');
-            $table->unsignedBigInteger('wallet_id')->comment('钱包ID');
             $table->nullableMorphs('loggable');
             $table->tinyInteger('action')->comment('操作类型');
             $table->unsignedBigInteger('before_balance')->default(0)->comment('变更前的余额');
@@ -25,7 +24,6 @@ class CreateWalletLogsTable extends Migration
             $table->timestamps();
 
             $table->index('user_id');
-            $table->index('wallet_id');
         });
     }