diff --git a/CHANGELOG.md b/CHANGELOG.md
index 722e8ffa..9e2ef0de 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,18 @@
+3.4.0 - 2023-09-02
+==================
+
+### Features
+- Add `language: haskell`.
+    - #2932 by @alunduil.
+- Improve cpu count detection when run under cgroups.
+    - #2979 PR by @jdb8.
+    - #2978 issue by @jdb8.
+
+### Fixes
+- Handle negative exit codes from hooks receiving posix signals.
+    - #2971 PR by @chriskuehl.
+    - #2970 issue by @chriskuehl.
+
 3.3.3 - 2023-06-13
 ==================
 
diff --git a/setup.cfg b/setup.cfg
index 88302e75..cfaa61bb 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = pre_commit
-version = 3.3.3
+version = 3.4.0
 description = A framework for managing and maintaining multi-language pre-commit hooks.
 long_description = file: README.md
 long_description_content_type = text/markdown