diff --git a/README.rst b/README.rst
index 01334ab..71b140f 100644
--- a/README.rst
+++ b/README.rst
@@ -77,7 +77,7 @@ First of all we need to receive an access token.
 2. Go to the `App registration <https://yoomoney.ru/myservices/new>`_ page.
 3. Set the application parameters. Save CLIENT_ID and YOUR_REDIRECT_URI for net steps
 4. Click the Confirm button.
-5. Paste CLIENT_ID and REDIRECT_URI insted of YOUR_CLIENT_ID and YOUR_REDIRECT_URI. Choose scopes and run code.
+5. Paste CLIENT_ID, REDIRECT_URI and CLIENT_SECRET insted of YOUR_CLIENT_ID, YOUR_REDIRECT_URI and YOUR_CLIENT_SECRET. Choose scopes and run code.
 6. Follow all steps from the program.
 
 .. code:: python
@@ -87,6 +87,7 @@ First of all we need to receive an access token.
     Authorize(
           client_id="YOUR_CLIENT_ID",
           redirect_uri="YOUR_REDIRECT_URI",
+          client_secret="YOUR_CLIENT_SECRET",
           scope=["account-info",
                  "operation-history",
                  "operation-details",
diff --git a/examples/authorize.py b/examples/authorize.py
index 3855854..c6f6c70 100644
--- a/examples/authorize.py
+++ b/examples/authorize.py
@@ -3,11 +3,12 @@
 Authorize(
     client_id="YOUR_CLIENT_ID",
     redirect_uri="YOUR_REDIRECT_URI",
+    client_secret="YOUR_CLIENT_SECRET",
     scope=["account-info",
-           "operation-history",
-           "operation-details",
-           "incoming-transfers",
-           "payment-p2p",
-           "payment-shop",
-           ]
-          )
+        "operation-history",
+        "operation-details",
+        "incoming-transfers",
+        "payment-p2p",
+        "payment-shop",
+    ]
+)
diff --git a/examples/history.py b/examples/history.py
index 79a6e86..05acfa6 100644
--- a/examples/history.py
+++ b/examples/history.py
@@ -20,4 +20,3 @@
     print("\tAmount     -->", operation.amount)
     print("\tLabel      -->", operation.label)
     print("\tType       -->", operation.type)
-
diff --git a/examples/operation_details.py b/examples/operation_details.py
index 8f2209a..99fd5fa 100644
--- a/examples/operation_details.py
+++ b/examples/operation_details.py
@@ -11,4 +11,4 @@
 max_size = len(max(properties, key=len))
 
 for prop in properties:
-    print(prop, " " * (max_size - len(prop)), "-->", str(details.__getattribute__(prop)).replace('\n', ' '))
\ No newline at end of file
+    print(prop, " " * (max_size - len(prop)), "-->", str(details.__getattribute__(prop)).replace('\n', ' '))
diff --git a/examples/quickpay.py b/examples/quickpay.py
index 3fd7d45..bdb4d5c 100644
--- a/examples/quickpay.py
+++ b/examples/quickpay.py
@@ -1,12 +1,12 @@
 from yoomoney import Quickpay
 
 quickpay = Quickpay(
-            receiver="410019014512803",
-            quickpay_form="shop",
-            targets="Sponsor this project",
-            paymentType="SB",
-            sum=150,
-            )
+    receiver="410019014512803",
+    quickpay_form="shop",
+    targets="Sponsor this project",
+    paymentType="SB",
+    sum=150,
+)
 
 print(quickpay.base_url)
-print(quickpay.redirected_url)
\ No newline at end of file
+print(quickpay.redirected_url)
diff --git a/yoomoney/authorize/authorize.py b/yoomoney/authorize/authorize.py
index 2421b8e..a851ff9 100644
--- a/yoomoney/authorize/authorize.py
+++ b/yoomoney/authorize/authorize.py
@@ -6,13 +6,14 @@
     UnauthorizedClient,
     InvalidGrant,
     EmptyToken
-    )
+)
 
 class Authorize:
     def __init__(
             self,
             client_id: str,
             redirect_uri: str,
+            client_secret: str,
             scope: List[str]
                   ):
 
@@ -39,11 +40,7 @@ def __init__(
             pass
 
         url = "https://yoomoney.ru/oauth/token?code={code}&client_id={client_id}&" \
-              "grant_type=authorization_code&redirect_uri={redirect_uri}".format(code=str(code),
-                                                                                 client_id=client_id,
-                                                                                 redirect_uri=redirect_uri,
-                                                                                 )
-
+              "grant_type=authorization_code&redirect_uri={redirect_uri}&client_secret={client_secret}".format(code=str(code), client_id=client_id, redirect_uri=redirect_uri, client_secret=client_secret )
         response = requests.request("POST", url, headers=headers)
 
         if "error" in response.json():