diff --git a/clients/python/test/test_locales_api.py b/clients/python/test/test_locales_api.py
index d6371c8b8..a898e8048 100644
--- a/clients/python/test/test_locales_api.py
+++ b/clients/python/test/test_locales_api.py
@@ -15,7 +15,7 @@
 import sys
 
 if sys.version_info[:2] <= (3, 7):
-    from mock import Mock, patch 
+    from mock import Mock, patch
 else:
     from unittest.mock import Mock, patch
 
@@ -71,7 +71,7 @@ def test_locale_download(self, mock_get):
         mock_get.return_value.data = body
         mock_get.return_value.status = 200
         mock_get.return_value.getencoding.return_value = 'utf-8'
-        mock_get.return_value.getheader.side_effect = { 'Content-Disposition': None }.get
+        mock_get.return_value.headers = { 'Content-Disposition': None }
 
         with phrase_api.ApiClient(self.configuration) as api_client:
             api_instance = phrase_api.api.locales_api.LocalesApi(api_client)
diff --git a/clients/python/test/test_uploads_api.py b/clients/python/test/test_uploads_api.py
index 8eb11627f..6b0678cd9 100644
--- a/clients/python/test/test_uploads_api.py
+++ b/clients/python/test/test_uploads_api.py
@@ -44,7 +44,7 @@ def test_upload_create(self, mock_post):
         mock_post.return_value.data = '{"id": "upload_id", "format": "csv"}'.encode()
         mock_post.return_value.getencoding.return_value = 'utf-8'
         mock_post.return_value.status = 201
-        mock_post.return_value.getheader.side_effect = { 'Content-Type': "application/json" }.get
+        mock_post.return_value.headers = { 'Content-Type': "application/json" }
 
         project_id = "project_id_example"
         with phrase_api.ApiClient(self.configuration) as api_client:
diff --git a/openapi-generator/templates/python/README_onlypackage.mustache b/openapi-generator/templates/python/README_onlypackage.mustache
index 149360d07..18b198d93 100644
--- a/openapi-generator/templates/python/README_onlypackage.mustache
+++ b/openapi-generator/templates/python/README_onlypackage.mustache
@@ -24,7 +24,7 @@ This python library package is generated without supporting files like setup.py
 
 To be able to use it, you will need these dependencies in your own package that uses this library:
 
-* urllib3 >= 1.15, < 2.6
+* urllib3 >= 1.15
 * six >= 1.10
 * certifi
 * python-dateutil
diff --git a/openapi-generator/templates/python/api_client.mustache b/openapi-generator/templates/python/api_client.mustache
index 89eab7fa8..f5394e88f 100644
--- a/openapi-generator/templates/python/api_client.mustache
+++ b/openapi-generator/templates/python/api_client.mustache
@@ -209,14 +209,14 @@ class ApiClient(object):
             return (return_data)
         else:
             return (return_data, response_data.status,
-                    response_data.getheaders())
+                    response_data.headers)
 {{/tornado}}
 {{#tornado}}
         if _return_http_data_only:
             raise tornado.gen.Return(return_data)
         else:
             raise tornado.gen.Return((return_data, response_data.status,
-                                      response_data.getheaders()))
+                                      response_data.headers))
 {{/tornado}}
 
     def sanitize_for_serialization(self, obj):
diff --git a/openapi-generator/templates/python/exceptions.mustache b/openapi-generator/templates/python/exceptions.mustache
index dd012f34a..5e1d808c3 100644
--- a/openapi-generator/templates/python/exceptions.mustache
+++ b/openapi-generator/templates/python/exceptions.mustache
@@ -80,7 +80,7 @@ class ApiException(OpenApiException):
             self.status = http_resp.status
             self.reason = http_resp.reason
             self.body = http_resp.data
-            self.headers = http_resp.getheaders()
+            self.headers = http_resp.headers
         else:
             self.status = status
             self.reason = reason
diff --git a/openapi-generator/templates/python/python-experimental/README_onlypackage.mustache b/openapi-generator/templates/python/python-experimental/README_onlypackage.mustache
index 37aa1eb83..11c002c9a 100644
--- a/openapi-generator/templates/python/python-experimental/README_onlypackage.mustache
+++ b/openapi-generator/templates/python/python-experimental/README_onlypackage.mustache
@@ -25,7 +25,7 @@ This python library package is generated without supporting files like setup.py
 
 To be able to use it, you will need these dependencies in your own package that uses this library:
 
-* urllib3 >= 1.15, < 2.6
+* urllib3 >= 1.15
 * six >= 1.10
 * certifi
 * python-dateutil
diff --git a/openapi-generator/templates/python/python-experimental/api_client.mustache b/openapi-generator/templates/python/python-experimental/api_client.mustache
index 774dae89c..9a47a50fa 100644
--- a/openapi-generator/templates/python/python-experimental/api_client.mustache
+++ b/openapi-generator/templates/python/python-experimental/api_client.mustache
@@ -202,14 +202,14 @@ class ApiClient(object):
             return (return_data)
         else:
             return (return_data, response_data.status,
-                    response_data.getheaders())
+                    response_data.headers)
 {{/tornado}}
 {{#tornado}}
         if _return_http_data_only:
             raise tornado.gen.Return(return_data)
         else:
             raise tornado.gen.Return((return_data, response_data.status,
-                                      response_data.getheaders()))
+                                      response_data.headers))
 {{/tornado}}
 
     def sanitize_for_serialization(self, obj):
diff --git a/openapi-generator/templates/python/python-experimental/requirements.mustache b/openapi-generator/templates/python/python-experimental/requirements.mustache
index 3b219f8ce..a56bedffb 100644
--- a/openapi-generator/templates/python/python-experimental/requirements.mustache
+++ b/openapi-generator/templates/python/python-experimental/requirements.mustache
@@ -4,4 +4,4 @@ future; python_version<="2.7"
 six >= 1.10
 python_dateutil >= 2.5.3
 setuptools >= 21.0.0
-urllib3 >= 1.15.1, < 2.6
+urllib3 >= 1.15.1
diff --git a/openapi-generator/templates/python/python-experimental/setup.mustache b/openapi-generator/templates/python/python-experimental/setup.mustache
index d6b586867..c1df4717e 100644
--- a/openapi-generator/templates/python/python-experimental/setup.mustache
+++ b/openapi-generator/templates/python/python-experimental/setup.mustache
@@ -17,7 +17,7 @@ VERSION = "{{packageVersion}}"
 # http://pypi.python.org/pypi/setuptools
 
 REQUIRES = [
-  "urllib3>=1.15,<2.6",
+  "urllib3>=1.15",
   "six >= 1.10",
   "certifi",
   "python-dateutil",
diff --git a/openapi-generator/templates/python/requirements.mustache b/openapi-generator/templates/python/requirements.mustache
index 86611d576..eb358efd5 100644
--- a/openapi-generator/templates/python/requirements.mustache
+++ b/openapi-generator/templates/python/requirements.mustache
@@ -3,4 +3,4 @@ future; python_version<="2.7"
 six >= 1.10
 python_dateutil >= 2.5.3
 setuptools >= 21.0.0
-urllib3 >= 1.15.1, < 2.6
+urllib3 >= 1.15.1
diff --git a/openapi-generator/templates/python/rest.mustache b/openapi-generator/templates/python/rest.mustache
index 418d8f268..51795af63 100644
--- a/openapi-generator/templates/python/rest.mustache
+++ b/openapi-generator/templates/python/rest.mustache
@@ -32,11 +32,11 @@ class RESTResponse(io.IOBase):
 
     def getheaders(self):
         """Returns a dictionary of the response headers."""
-        return self.urllib3_response.getheaders()
+        return self.urllib3_response.headers
 
     def getheader(self, name, default=None):
         """Returns a given response header."""
-        return self.urllib3_response.getheader(name, default)
+        return self.urllib3_response.headers.get(name, default)
 
     def getencoding(self):
         """Returns charset encoding returned by the server."""
diff --git a/openapi-generator/templates/python/setup.mustache b/openapi-generator/templates/python/setup.mustache
index 9fc8bec83..ce774eafb 100644
--- a/openapi-generator/templates/python/setup.mustache
+++ b/openapi-generator/templates/python/setup.mustache
@@ -16,7 +16,7 @@ VERSION = "{{packageVersion}}"
 # prerequisite: setuptools
 # http://pypi.python.org/pypi/setuptools
 
-REQUIRES = ["urllib3>=1.15,<2.6", "six >= 1.10", "certifi", "python-dateutil"]
+REQUIRES = ["urllib3>=1.15", "six >= 1.10", "certifi", "python-dateutil"]
 {{#asyncio}}
 REQUIRES.append("aiohttp >= 3.0.0")
 {{/asyncio}}