diff --git a/CHANGELOG.md b/CHANGELOG.md
index 952355f4c..82da8c6aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-auth/#history
 
+### [2.0.1](https://www.github.com/googleapis/google-auth-library-python/compare/v2.0.0...v2.0.1) (2021-08-17)
+
+
+### Bug Fixes
+
+* normalize AWS paths correctly on windows ([#842](https://www.github.com/googleapis/google-auth-library-python/issues/842)) ([4e0fb1c](https://www.github.com/googleapis/google-auth-library-python/commit/4e0fb1cee78ee56b878b6e12be3b3c58df242b05))
+
 ## [2.0.0](https://www.github.com/googleapis/google-auth-library-python/compare/v2.0.0-b1...v2.0.0) (2021-08-16)
 
 
diff --git a/google/auth/aws.py b/google/auth/aws.py
index 2f2a1359b..c8deee707 100644
--- a/google/auth/aws.py
+++ b/google/auth/aws.py
@@ -45,6 +45,7 @@
 import os
 import re
 import urllib
+from urllib.parse import urljoin
 
 from google.auth import _helpers
 from google.auth import environment_vars
@@ -112,13 +113,17 @@ def get_request_options(
         additional_headers = additional_headers or {}
 
         uri = urllib.parse.urlparse(url)
+        # Normalize the URL path. This is needed for the canonical_uri.
+        # os.path.normpath can't be used since it normalizes "/" paths
+        # to "\\" in Windows OS.
+        normalized_uri = urllib.parse.urlparse(urljoin(url, uri.path))
         # Validate provided URL.
         if not uri.hostname or uri.scheme != "https":
             raise ValueError("Invalid AWS service URL")
 
         header_map = _generate_authentication_header_map(
             host=uri.hostname,
-            canonical_uri=os.path.normpath(uri.path or "/"),
+            canonical_uri=normalized_uri.path or "/",
             canonical_querystring=_get_canonical_querystring(uri.query),
             method=method,
             region=self._region_name,
diff --git a/google/auth/version.py b/google/auth/version.py
index db6d3e9e7..1a390124f 100644
--- a/google/auth/version.py
+++ b/google/auth/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2.0.0b1"
+__version__ = "2.0.1"