diff --git a/database/migrations/2024_02_05_000010_create_openai_requests_table.php b/database/migrations/2024_02_05_000010_create_openai_requests_table.php
index 05e7604..517ba7f 100644
--- a/database/migrations/2024_02_05_000010_create_openai_requests_table.php
+++ b/database/migrations/2024_02_05_000010_create_openai_requests_table.php
@@ -16,8 +16,8 @@ public function up(): void
 
             $table->string('method')->nullable()->index();
             $table->string('status')->index();
-            $table->unsignedDecimal('cost', 16, 8)->nullable();
-            $table->unsignedDecimal('time_sec', 10, 4)->nullable();
+            $table->decimal('cost', 16, 8)->nullable();
+            $table->decimal('time_sec', 10, 4)->nullable();
             $table->string('model_requested')->nullable();
             $table->string('model_used')->nullable();
             $table->jsonb('input')->nullable();