diff --git a/CHANGELOG.md b/CHANGELOG.md
index 58aa01b..eacfd37 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - use trace level logging for context errors
-- prefix named docker resources with drone-
+- prefix docker resource names
+
+### Fixed
+- initialize environment map to prevent nil pointer
 
 ### Added
 - support for global environment variable extension