diff --git a/CHANGELOG.md b/CHANGELOG.md
index a0b3509..ddb241f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,23 @@ This project uses [**Break Versioning**](https://www.taoensso.com/break-versioni
 
 ---
 
+# `v3.4.2` (2024-05-26)
+
+> **Dep**: Nippy is [on Clojars](https://clojars.org/com.taoensso/nippy/versions/3.4.2).  
+> **Versioning**: Nippy uses [Break Versioning](https://www.taoensso.com/break-versioning).
+
+This release updates some internal dependencies and is **recommended for all existing users**.
+
+It should be a **non-breaking update** for almost all users of Nippy `v3.4.x`, `v3.3.x`, and `v3.2.x`.
+
+Notes:
+
+- May produce **different serialized output** to `v3.4.0` and `v3.3.0`. Most users won't care about this, but you could be affected if you depend on specific serialized byte values (for example by comparing serialized output between different versions of Nippy).
+- When using Nippy version **X** to thaw data frozen by Nippy version **Y>X**, there is necessarily a risk of the thaw throwing when encountering unfamiliar types. This **can affect rolling updates** and/or **limit your ability to revert** a Nippy update - **so please ensure adequate testing** in your environment before updating against production data!
+- As always, **please report any unexpected problems** 🙏
+
+\- [Peter Taoussanis](https://www.taoensso.com)
+
 # `v3.4.1` (2024-05-02)
 
 > **Dep**: Nippy is [on Clojars](https://clojars.org/com.taoensso/nippy/versions/3.4.1).  
diff --git a/README.md b/README.md
index bd5eedd..86dbde1 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Used by [Carmine](https://www.taoensso.com/carmine), [Faraday](https://www.taoen
 
 ## Latest release/s
 
-- `2024-05-02` `v3.4.1`: [release info](../../releases/tag/v3.4.1)
+- `2024-05-26` `v3.4.2`: [release info](../../releases/tag/v3.4.2)
 
 [![Main tests][Main tests SVG]][Main tests URL]
 [![Graal tests][Graal tests SVG]][Graal tests URL]
diff --git a/project.clj b/project.clj
index 9eb99de..6596b0e 100644
--- a/project.clj
+++ b/project.clj
@@ -1,4 +1,4 @@
-(defproject com.taoensso/nippy "3.4.1"
+(defproject com.taoensso/nippy "3.4.2"
   :author "Peter Taoussanis <https://www.taoensso.com>"
   :description "The fastest serialization library for Clojure"
   :url "https://www.taoensso.com/nippy"