diff --git a/sdks/python/dropbox_sign/api_client.py b/sdks/python/dropbox_sign/api_client.py
index 800e07ad5..509df36d4 100644
--- a/sdks/python/dropbox_sign/api_client.py
+++ b/sdks/python/dropbox_sign/api_client.py
@@ -302,6 +302,8 @@ def response_deserialize(
         try:
             if response_type == "bytearray":
                 return_data = response_data.data
+            elif response_type == "io.IOBase":
+                return_data = self.__bytearray_to_iobase(response_data)
             elif response_type == "file":
                 return_data = self.__deserialize_file(response_data)
             elif response_type is not None:
@@ -691,6 +693,13 @@ def __deserialize_file(self, response):
 
         return path
 
+    def __bytearray_to_iobase(self, response):
+        """Convert bytearray to io.IOBase"""
+        buffer = io.BytesIO()
+        buffer.write(response.data)
+        buffer.seek(0)
+        return buffer
+
     def __deserialize_primitive(self, data, klass):
         """Deserializes string to primitive type.
 
diff --git a/sdks/python/templates/api_client.mustache b/sdks/python/templates/api_client.mustache
index 1ecc9b787..3fd4b3952 100644
--- a/sdks/python/templates/api_client.mustache
+++ b/sdks/python/templates/api_client.mustache
@@ -318,6 +318,10 @@ class ApiClient:
         try:
             if response_type == "bytearray":
                 return_data = response_data.data
+{{#useCustomTemplateCode}}
+            elif response_type == "io.IOBase":
+                return_data = self.__bytearray_to_iobase(response_data)
+{{/useCustomTemplateCode}}
             elif response_type == "file":
                 return_data = self.__deserialize_file(response_data)
             elif response_type is not None:
@@ -739,6 +743,15 @@ class ApiClient:
 
         return path
 
+    {{#useCustomTemplateCode}}
+    def __bytearray_to_iobase(self, response):
+        """Convert bytearray to io.IOBase"""
+        buffer = io.BytesIO()
+        buffer.write(response.data)
+        buffer.seek(0)
+        return buffer
+
+    {{/useCustomTemplateCode}}
     def __deserialize_primitive(self, data, klass):
         """Deserializes string to primitive type.