diff --git a/CHANGES.md b/CHANGES.md
index e25bc02fe..bb40f4226 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,18 @@
 # Release Notes
 
+## 2.1.155
+
+This release brings support for `--pip-version 23.3.2` along with
+optimizations that reduce built PEX size for both `--include-tools` and
+`--venv` PEXes (which includes the Pex PEX) as well as reduce PEX build
+time for `--pre-install-wheels` PEXes (the default) and PEX cold first
+boot time for `--no-pre-install-wheels` PEXes that use more than one
+parallel install job.
+
+* Add support for Pip 23.3.2. (#2307)
+* Remove `Pip.spawn_install_wheel` & optimize. (#2305)
+* Since we no longer use wheel code, remove it. (#2302)
+
 ## 2.1.154
 
 This release brings three new features:
diff --git a/pex/version.py b/pex/version.py
index a585835f4..a8a1167da 100644
--- a/pex/version.py
+++ b/pex/version.py
@@ -1,4 +1,4 @@
 # Copyright 2015 Pants project contributors (see CONTRIBUTORS.md).
 # Licensed under the Apache License, Version 2.0 (see LICENSE).
 
-__version__ = "2.1.154"
+__version__ = "2.1.155"