diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3d1a503b..96395dae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## In development
+## 23.5 (2023-12-24)
 
 - Fix Django versions in test matrix (#900).
 - Use ruff instead of black for formatting (#901).
diff --git a/pyproject.toml b/pyproject.toml
index d41addf2..910143be 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ license = {file = "LICENSE"}
 name = "django-bootstrap3"
 readme = "README.md"
 requires-python = ">=3.8"
-version = "23.5.dev1"
+version = "23.5"
 
 [project.urls]
 Changelog = "https://github.com/zostera/django-bootstrap3/blob/main/CHANGELOG.md"
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9c8d1209..a0053818 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,3 +1,5 @@
 -r requirements-test.txt
 -r docs/requirements.txt
 twine==4.0.2
+build==1.0.3
+setuptools==69.0.3