diff --git a/python/pip_install/extract_wheels/lib/requirements.py b/python/pip_install/extract_wheels/lib/requirements.py
index cfab339673..caf20d0f79 100644
--- a/python/pip_install/extract_wheels/lib/requirements.py
+++ b/python/pip_install/extract_wheels/lib/requirements.py
@@ -1,6 +1,8 @@
 import re
 from typing import Dict, Optional, Set, Tuple
 
+from pip._vendor.packaging.utils import canonicalize_name
+
 
 def parse_extras(requirements_path: str) -> Dict[str, Set[str]]:
     """Parse over the requirements.txt file to find extras requested.
@@ -38,7 +40,7 @@ def _parse_requirement_for_extra(
     matches = extras_pattern.match(requirement)
     if matches:
         return (
-            matches.group(1),
+            canonicalize_name(matches.group(1)),
             {extra.strip() for extra in matches.group(2).split(",")},
         )
 
diff --git a/python/pip_install/extract_wheels/lib/requirements_test.py b/python/pip_install/extract_wheels/lib/requirements_test.py
index 0ee425571f..4fe4d92e32 100644
--- a/python/pip_install/extract_wheels/lib/requirements_test.py
+++ b/python/pip_install/extract_wheels/lib/requirements_test.py
@@ -9,6 +9,8 @@ def test_parses_requirement_for_extra(self) -> None:
             ("name[foo]", ("name", frozenset(["foo"]))),
             ("name[ Foo123 ]", ("name", frozenset(["Foo123"]))),
             (" name1[ foo ] ", ("name1", frozenset(["foo"]))),
+            ("Name[foo]", ("name", frozenset(["foo"]))),
+            ("name_foo[bar]", ("name-foo", frozenset(["bar"]))),
             (
                 "name [fred,bar] @ http://foo.com ; python_version=='2.7'",
                 ("name", frozenset(["fred", "bar"])),
diff --git a/python/pip_install/extract_wheels/lib/wheel.py b/python/pip_install/extract_wheels/lib/wheel.py
index 74a963f382..6dab311637 100644
--- a/python/pip_install/extract_wheels/lib/wheel.py
+++ b/python/pip_install/extract_wheels/lib/wheel.py
@@ -8,6 +8,7 @@
 
 import installer
 import pkg_resources
+from pip._vendor.packaging.utils import canonicalize_name
 
 
 def current_umask() -> int:
@@ -38,7 +39,8 @@ def path(self) -> str:
     @property
     def name(self) -> str:
         # TODO Also available as installer.sources.WheelSource.distribution
-        return str(self.metadata['Name'])
+        name = str(self.metadata['Name'])
+        return canonicalize_name(name)
 
     @property
     def metadata(self) -> email.message.Message: