diff --git a/setup.cfg b/setup.cfg
index b0ee6567..9dee3575 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = Flask
-# Version needs regex in setup.py.
+version = attr: flask.__version__
 url = https://palletsprojects.com/p/flask
 project_urls =
     Donate = https://palletsprojects.com/donate
diff --git a/setup.py b/setup.py
index 6218be60..7ec4196f 100644
--- a/setup.py
+++ b/setup.py
@@ -1,14 +1,8 @@
-import re
-
 from setuptools import setup
 
-with open("src/flask/__init__.py", encoding="utf8") as f:
-    version = re.search(r'__version__ = "(.*?)"', f.read()).group(1)
-
 # Metadata goes in setup.cfg. These are here for GitHub's dependency graph.
 setup(
     name="Flask",
-    version=version,
     install_requires=[
         "Werkzeug>=0.15",
         "Jinja2>=2.10.1",