diff --git a/retailcrm/versions/v3.py b/retailcrm/versions/v3.py
index 8e26418..cc9409d 100644
--- a/retailcrm/versions/v3.py
+++ b/retailcrm/versions/v3.py
@@ -461,11 +461,15 @@ class Client(Base):
 
         return self.get('/store/inventories')
 
-    def inventories_upload(self, offers):
+    def inventories_upload(self, offers, site=None):
         """
         :param offers:
+        :param site:
         :return: Response
         """
+        if site is not None:
+            self.parameters['site'] = site
+        
         self.parameters['offers'] = json.dumps(offers)
 
         return self.post('/store/inventories/upload')
diff --git a/retailcrm/versions/v4.py b/retailcrm/versions/v4.py
index f247b4f..91b028d 100644
--- a/retailcrm/versions/v4.py
+++ b/retailcrm/versions/v4.py
@@ -522,11 +522,15 @@ class Client(Base):
 
         return self.get('/store/inventories')
 
-    def inventories_upload(self, offers):
+    def inventories_upload(self, offers, site=None):
         """
         :param offers:
+        :param site:
         :return: Response
         """
+        if site is not None:
+            self.parameters['site'] = site
+
         self.parameters['offers'] = json.dumps(offers)
 
         return self.post('/store/inventories/upload')
diff --git a/retailcrm/versions/v5.py b/retailcrm/versions/v5.py
index d5452db..1749436 100644
--- a/retailcrm/versions/v5.py
+++ b/retailcrm/versions/v5.py
@@ -899,13 +899,18 @@ class Client(Base):
 
         return self.get('/store/inventories')
 
-    def inventories_upload(self, offers):
+    def inventories_upload(self, offers, site=None):
         """
         :param offers:
+        :param site:
         :return: Response
         """
+        if site is not None:
+            self.parameters['site'] = site
+        
         self.parameters['offers'] = json.dumps(offers)
 
+
         return self.post('/store/inventories/upload')
 
     def prices_upload(self, prices):