diff --git a/app/core/_blockchain/ton/toncenter.py b/app/core/_blockchain/ton/toncenter.py
index c867b33..0f91875 100644
--- a/app/core/_blockchain/ton/toncenter.py
+++ b/app/core/_blockchain/ton/toncenter.py
@@ -9,11 +9,15 @@ from app.core.logger import make_log
 
 
 class TonCenter:
+    LIMIT_PER_SECOND = 5
+
     def __init__(self, host: str, api_key: str = None, v3_host: str = None, testnet: bool = False):
         self.host = host
         self.api_key = api_key
         self.v3_host = v3_host
-        self.last_used = time.time()
+
+        self.reset_timer = time.time()
+        self.requests_count = 0
 
     async def request(self, method: str, endpoint: str, *args, v3: bool=False, tries_count=0, **kwargs) -> dict:
         if tries_count > 3:
@@ -26,11 +30,15 @@ class TonCenter:
                 kwargs['headers'] = kwargs.get('headers', {})
                 kwargs['headers']['X-API-Key'] = self.api_key
 
-            if not self.api_key:
-                while time.time() < self.last_used + 1.2:
-                    await asyncio.sleep(0.1)
+            if self.requests_count >= self.LIMIT_PER_SECOND:
+                while (time.time() - self.reset_timer) < 1.2:
+                    await asyncio.sleep(.1)
+
+                self.reset_timer = time.time()
+                self.requests_count = 0
+
+            self.requests_count += 1
 
-            self.last_used = time.time()
             response = await client.request(method, f"{self.v3_host if v3 is True else self.host}{endpoint}", *args, **kwargs)
             try:
                 if response.status_code != 200: