diff --git a/CHANGES.rst b/CHANGES.rst
index 0c0a817b0c..80d29f213e 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,10 +7,11 @@ The change log for the previous version, Zope 2.13, is at
 https://zope.readthedocs.io/en/2.13/CHANGES.html
 
 
-4.8.11 (unreleased)
+4.8.11 (2023-10-04)
 -------------------
 
-- Nothing changed yet.
+- Make sure the object title in the ZMI breadcrumbs is quoted
+  to prevent a cross-site scripting issue.
 
 
 4.8.10 (2023-09-21)
diff --git a/README.rst b/README.rst
index 0f9dfc8e35..146fb98c49 100644
--- a/README.rst
+++ b/README.rst
@@ -16,10 +16,6 @@
         :target: https://pypi.org/project/Zope/
         :alt: Supported Python versions
 
-.. image:: https://requires.io/github/zopefoundation/Zope/requirements.svg?branch=4.x
-        :target: https://requires.io/github/zopefoundation/Zope/requirements/?branch=4.x
-        :alt: Requirements Status
-
 .. |nbsp| unicode:: 0xA0 
         :trim:
 
diff --git a/docs/conf.py b/docs/conf.py
index 054c2ff3eb..664ad8ff50 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -24,7 +24,7 @@
 author = 'The Zope developer community'
 
 # The X.Y.Z version
-version = release = '4.8.10'
+version = release = '4.8.11'
 
 
 # -- General configuration ---------------------------------------------------
@@ -79,7 +79,7 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'default'
+html_theme = 'sphinx_rtd_theme'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
diff --git a/requirements-full.txt b/requirements-full.txt
index 5c8bf15bc2..a6b3988052 100644
--- a/requirements-full.txt
+++ b/requirements-full.txt
@@ -1,4 +1,4 @@
-Zope==< 5
+Zope==4.8.11
 AccessControl==4.4
 Acquisition==4.13
 AuthEncoding==4.3
diff --git a/setup.py b/setup.py
index 9bed2bb57c..1f6da70977 100644
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,7 @@ def _read_file(filename):
 README = _read_file('README.rst')
 CHANGES = _read_file('CHANGES.rst')
 
-version = '4.8.11.dev0'
+version = '4.8.11'
 
 
 setup(
diff --git a/versions-prod.cfg b/versions-prod.cfg
index 548751cb65..49272744a0 100644
--- a/versions-prod.cfg
+++ b/versions-prod.cfg
@@ -2,7 +2,7 @@
 # Version pins for required and commonly used dependencies.
 
 [versions]
-Zope = < 5
+Zope = 4.8.11
 Zope2 = 4.0
 # AccessControl 5+ no longer supports Zope 4.
 AccessControl = 4.4