diff --git a/CHANGELOG.md b/CHANGELOG.md
index a1e30a3..faa96bb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.12.1] - 2026-06-25
+
+### Bug Fixes
+
+- Use heredoc syntax for multi-line $GITHUB_ENV values
+
 ## [0.12.0] - 2026-06-24
 
 ### Features
diff --git a/src/devx/__init__.py b/src/devx/__init__.py
index 1a55b4b..3da9a1c 100644
--- a/src/devx/__init__.py
+++ b/src/devx/__init__.py
@@ -1,3 +1,3 @@
 """devx — reusable development and CI/CD tools for oblachno-oss projects."""
 
-__version__ = "0.12.0"
+__version__ = "0.12.1"