diff --git a/api/__pycache__/dependency.cpython-313.pyc b/api/__pycache__/dependency.cpython-313.pyc
index eb067d1..ef8b475 100644
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diff --git a/api/models/__pycache__/GenerationRequest.cpython-313.pyc b/api/models/__pycache__/GenerationRequest.cpython-313.pyc
index 0726ddb..1bfa07a 100644
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diff --git a/api/service/__pycache__/generation_service.cpython-313.pyc b/api/service/__pycache__/generation_service.cpython-313.pyc
index a0f1879..5e9d4e9 100644
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diff --git a/api/service/generation_service.py b/api/service/generation_service.py
index d729d83..d426afa 100644
--- a/api/service/generation_service.py
+++ b/api/service/generation_service.py
@@ -22,6 +22,9 @@ from adapters.s3_adapter import S3Adapter
 
 logger = logging.getLogger(__name__)
 
+# Limit concurrent generations to 4
+generation_semaphore = asyncio.Semaphore(4)
+
 
 # --- Вспомогательная функция генерации ---
 async def generate_image_task(
@@ -141,10 +144,12 @@ class GenerationService:
             generation_model.id = gen_id
 
             async def runner(gen):
-                logger.info(f"Starting background generation task for ID: {gen.id}")
+                logger.info(f"Generation {gen.id} entered queue (waiting for slot)...")
                 try:
-                    await self.create_generation(gen)
-                    logger.info(f"Background generation task finished for ID: {gen.id}")
+                    async with generation_semaphore:
+                        logger.info(f"Starting background generation task for ID: {gen.id}")
+                        await self.create_generation(gen)
+                        logger.info(f"Background generation task finished for ID: {gen.id}")
                 except Exception:
                     # если генерация уже пошла и упала — пометим FAILED
                     try:
diff --git a/models/__pycache__/Generation.cpython-313.pyc b/models/__pycache__/Generation.cpython-313.pyc
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