diff --git a/README.md b/README.md
index 854087d..9bafb76 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@ This client has the following external dependencies:
 *   six v1.8.0+
 *   python_dateutil v2.5.3+
 *   setuptools v21.0.0+
-*   urllib3 v1.15.1+
+*   urllib3 v2.0.0+
 *   PyJWT v2.0.0+
 *   cryptography v2.5+
 
diff --git a/docusign_esign/client/api_response.py b/docusign_esign/client/api_response.py
index a72da16..f55137d 100644
--- a/docusign_esign/client/api_response.py
+++ b/docusign_esign/client/api_response.py
@@ -46,11 +46,11 @@ def __init__(self, resp):
 
     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)
 
 
 class RESTClientObject(object):
diff --git a/setup.py b/setup.py
index 854751d..85edc1c 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
 # prerequisite: setuptools
 # http://pypi.python.org/pypi/setuptools
 
-REQUIRES = ["urllib3 >= 1.15", "six >= 1.8.0", "certifi >= 14.05.14", "python-dateutil >= 2.5.3", "setuptools >= 21.0.0", "PyJWT>=2.0.0", "cryptography>=2.5"]
+REQUIRES = ["urllib3 >= 2.0.0, < 3.0.0", "six >= 1.8.0", "certifi >= 14.05.14", "python-dateutil >= 2.5.3", "setuptools >= 21.0.0", "PyJWT>=2.0.0", "cryptography>=2.5"]
 
 class CleanCommand(Command):
     """Custom clean command to tidy up the project root."""