diff --git a/CHANGES b/CHANGES
index 179ce03..595df02 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+1.21.6
+_______
+- Fix sending data in the body of the request
+
 1.21.5
 _______
 - Add url and scanned_url to url analyses history filters
diff --git a/intezer_sdk/__init__.py b/intezer_sdk/__init__.py
index 97e3f85..b93f5dc 100644
--- a/intezer_sdk/__init__.py
+++ b/intezer_sdk/__init__.py
@@ -1 +1 @@
-__version__ = '1.21.5'
+__version__ = '1.21.6'
diff --git a/intezer_sdk/api.py b/intezer_sdk/api.py
index c269a30..af769a8 100644
--- a/intezer_sdk/api.py
+++ b/intezer_sdk/api.py
@@ -121,7 +121,7 @@ def _request(self,
                 stream=stream,
                 timeout=timeout_in_seconds or self.timeout_in_seconds
             )
-        elif isinstance(data, bytes):
+        elif isinstance(data, (bytes, str)):
             response = self._session.request(
                 method,
                 url,