diff --git a/CHANGELOG.md b/CHANGELOG.md
index b446d03..825efe0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,25 @@ This project uses [**Break Versioning**](https://www.taoensso.com/break-versioni
 
 ---
 
+# `v1.2.1` (2025-12-16)
+
+## 📦 Dependencies
+
+Available on Clojars:
+
+1. [Telemere](https://clojars.org/com.taoensso/telemere/versions/1.2.1) - main dep
+2. [SLF4J provider](https://clojars.org/com.taoensso/telemere-slf4j/versions/1.2.1) - extra dep to [send Java logging](https://github.com/taoensso/telemere/wiki/3-Config#java-logging) to Telemere
+
+This project uses [Break Versioning](https://www.taoensso.com/break-versioning).
+
+## Release notes
+
+This is a **hotfix release** to fix a regression in v1.2.0 that prevented errors from correctly appearing via the Timbre->Telemere appender.
+
+This should be a safe upgrade for users of v1.2.0, apologies for the trouble! - Peter Taoussanis
+
+---
+
 # `v1.2.0` (2025-12-09)
 
 ## 📦 Dependencies
diff --git a/README.md b/README.md
index 7673793..c5eeec6 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 <a href="https://www.taoensso.com/clojure" title="More stuff by @ptaoussanis at www.taoensso.com"><img src="https://www.taoensso.com/open-source.png" alt="Taoensso open source" width="340"/></a>  
-[**API**][cljdoc] | [**Wiki**][GitHub wiki] | [Slack][] | Latest release: [v1.2.0](../../releases/tag/v1.2.0) (2025-12-09)
+[**API**][cljdoc] | [**Wiki**][GitHub wiki] | [Slack][] | Latest release: [v1.2.1](../../releases/tag/v1.2.1) (2025-12-16)
 
 [![Clj tests][Clj tests SVG]][Clj tests URL]
 [![Cljs tests][Cljs tests SVG]][Cljs tests URL]
diff --git a/main/project.clj b/main/project.clj
index fd7e6ef..2fe025f 100644
--- a/main/project.clj
+++ b/main/project.clj
@@ -1,4 +1,4 @@
-(defproject com.taoensso/telemere "1.2.0"
+(defproject com.taoensso/telemere "1.2.1"
   :author "Peter Taoussanis <https://www.taoensso.com>"
   :description "Structured logs and telemetry for Clojure/Script"
   :url "https://www.taoensso.com/telemere"
@@ -50,7 +50,7 @@
      [org.clojure/test.check        "1.1.2"]
      [org.clojure/tools.logging     "1.3.0"]
      [org.slf4j/slf4j-api           "2.0.17"]
-     [com.taoensso/telemere-slf4j   "1.2.0"]
+     [com.taoensso/telemere-slf4j   "1.2.1"]
      #_[org.slf4j/slf4j-simple      "2.0.16"]
      #_[org.slf4j/slf4j-nop         "2.0.16"]
      #_[io.github.paintparty/bling  "0.4.2"]
diff --git a/slf4j/project.clj b/slf4j/project.clj
index 66ba74b..18697e5 100644
--- a/slf4j/project.clj
+++ b/slf4j/project.clj
@@ -1,4 +1,4 @@
-(defproject com.taoensso/telemere-slf4j "1.2.0"
+(defproject com.taoensso/telemere-slf4j "1.2.1"
   :author "Peter Taoussanis <https://www.taoensso.com>"
   :description "Telemere backend/provider for SLF4J API v2"
   :url "https://www.taoensso.com/telemere"
@@ -18,7 +18,7 @@
    {:dependencies
     [[org.clojure/clojure   "1.12.3"]
      [org.slf4j/slf4j-api   "2.0.17"]
-     [com.taoensso/telemere "1.2.0"]]}
+     [com.taoensso/telemere "1.2.1"]]}
 
    :dev
    {:plugins