diff --git a/CHANGES.rst b/CHANGES.rst
index 3e50fe0fa8..e8b5cc1fa2 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -9,6 +9,7 @@ Unreleased
 -   Restructure the code such that the Flask (app) and Blueprint
     classes have Sans-IO bases. :pr:`5127`
 -   Allow self as an argument to url_for. :pr:`5264`
+-   Require Werkzeug >= 3.0.0.
 
 
 Version 2.3.3
diff --git a/pyproject.toml b/pyproject.toml
index 153eb4f3cb..eb7ef34e0f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ classifiers = [
 ]
 requires-python = ">=3.8"
 dependencies = [
-    "Werkzeug>=2.3.7",
+    "Werkzeug>=3.0.0",
     "Jinja2>=3.1.2",
     "itsdangerous>=2.1.2",
     "click>=8.1.3",
diff --git a/requirements/tests-pallets-min.in b/requirements/tests-pallets-min.in
index 68f3fc7bf0..c393821987 100644
--- a/requirements/tests-pallets-min.in
+++ b/requirements/tests-pallets-min.in
@@ -1,4 +1,4 @@
-Werkzeug==2.3.7
+Werkzeug==3.0.0
 Jinja2==3.1.2
 MarkupSafe==2.1.1
 itsdangerous==2.1.2
diff --git a/requirements/tests-pallets-min.txt b/requirements/tests-pallets-min.txt
index d1e8b1631c..dc989a1255 100644
--- a/requirements/tests-pallets-min.txt
+++ b/requirements/tests-pallets-min.txt
@@ -1,4 +1,4 @@
-# SHA1:fe057f95a98251b053eec8fa27df0feb722c70e8
+# SHA1:fbb9fae044c2e7d895de9b3d7cbb40a11a822f04
 #
 # This file is autogenerated by pip-compile-multi
 # To update, run:
@@ -18,5 +18,5 @@ markupsafe==2.1.1
     #   -r requirements/tests-pallets-min.in
     #   jinja2
     #   werkzeug
-werkzeug==2.3.7
+werkzeug==3.0.0
     # via -r requirements/tests-pallets-min.in