diff --git a/binance/async_client.py b/binance/async_client.py
index a82b9cf8..94939ff2 100644
--- a/binance/async_client.py
+++ b/binance/async_client.py
@@ -4,6 +4,7 @@
 from urllib.parse import urlencode
 import time
 import aiohttp
+import yarl
 
 from binance.enums import HistoricalKlinesType
 from binance.exceptions import (
@@ -103,8 +104,14 @@ async def _request(
     ):
         kwargs = self._get_request_kwargs(method, signed, force_params, **kwargs)
 
+        if method == 'get':
+            # url encode the query string
+            if 'params' in kwargs:
+                uri = f"{uri}?{kwargs['params']}"
+                kwargs.pop('params')
+
         async with getattr(self.session, method)(
-            uri, proxy=self.https_proxy, **kwargs
+            yarl.URL(uri, encoded=True), proxy=self.https_proxy, **kwargs
         ) as response:
             self.response = response
             return await self._handle_response(response)
diff --git a/binance/base_client.py b/binance/base_client.py
index 9c6bd5c3..34578bd3 100644
--- a/binance/base_client.py
+++ b/binance/base_client.py
@@ -10,6 +10,7 @@
 from Crypto.PublicKey import RSA, ECC
 from Crypto.Hash import SHA256
 from Crypto.Signature import pkcs1_15, eddsa
+import urllib.parse as _urlencode
 from operator import itemgetter
 from urllib.parse import urlencode
 
@@ -59,6 +60,8 @@ class BaseClient:
 
     REQUEST_TIMEOUT: float = 10
 
+    REQUEST_RECVWINDOW: int = 10000 # 10 seconds
+
     SYMBOL_TYPE_SPOT = "SPOT"
 
     ORDER_STATUS_NEW = "NEW"
@@ -300,13 +303,21 @@ def _rsa_signature(self, query_string: str):
         assert self.PRIVATE_KEY
         h = SHA256.new(query_string.encode("utf-8"))
         signature = pkcs1_15.new(self.PRIVATE_KEY).sign(h)  # type: ignore
-        return b64encode(signature).decode()
+        res = b64encode(signature).decode()
+        # return self.encode_uri_component(res)
+        return res
+
+    @staticmethod
+    def encode_uri_component(uri, safe="~()*!.'"):
+        return _urlencode.quote(uri, safe=safe)
 
     def _ed25519_signature(self, query_string: str):
         assert self.PRIVATE_KEY
-        return b64encode(
+        res = b64encode(
             eddsa.new(self.PRIVATE_KEY, "rfc8032").sign(query_string.encode())
         ).decode()  # type: ignore
+        # return self.encode_uri_component(res)
+        return res
 
     def _hmac_signature(self, query_string: str) -> str:
         assert self.API_SECRET, "API Secret required for private endpoints"
@@ -317,7 +328,7 @@ def _hmac_signature(self, query_string: str) -> str:
         )
         return m.hexdigest()
 
-    def _generate_signature(self, data: Dict) -> str:
+    def _generate_signature(self, data: Dict, uri_encode=True) -> str:
         sig_func = self._hmac_signature
         if self.PRIVATE_KEY:
             if self._is_rsa:
@@ -325,7 +336,8 @@ def _generate_signature(self, data: Dict) -> str:
             else:
                 sig_func = self._ed25519_signature
         query_string = "&".join([f"{d[0]}={d[1]}" for d in self._order_params(data)])
-        return sig_func(query_string)
+        res = sig_func(query_string)
+        return self.encode_uri_component(res) if uri_encode else res
 
     def _sign_ws_params(self, params, signature_func):
         if "signature" in params:
@@ -445,6 +457,8 @@ def _get_request_kwargs(
             kwargs["data"]["timestamp"] = int(
                 time.time() * 1000 + self.timestamp_offset
             )
+            if self.REQUEST_RECVWINDOW:
+                kwargs["data"]["recvWindow"] = self.REQUEST_RECVWINDOW
             kwargs["data"]["signature"] = self._generate_signature(kwargs["data"])
 
         # sort get and post params to match signature order
diff --git a/tests/test_cryptography.py b/tests/test_cryptography.py
index 8048fda3..2bafdcf6 100644
--- a/tests/test_cryptography.py
+++ b/tests/test_cryptography.py
@@ -46,7 +46,7 @@ def test_encryption():
             private_key_pass=case["password"],
             ping=False,
         )
-        signature = client._generate_signature(data)
+        signature = client._generate_signature(data, False)
         assert signature == case["expected_signature"], (
             f"Test failed: {case['description']}"
         )