diff --git a/CHANGES.md b/CHANGES.md
index f7eb2f5..f6c10a8 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.1] - 2024-09-05
+
+* Use `conversion_factor` instead of `allocation` for `replace` transformations
+
 ## [0.4.0] - 2024-08-30
 
 * Add biosphere changes not listed in change report
diff --git a/ecoinvent_migrate/__init__.py b/ecoinvent_migrate/__init__.py
index 82586b1..c171972 100644
--- a/ecoinvent_migrate/__init__.py
+++ b/ecoinvent_migrate/__init__.py
@@ -6,6 +6,6 @@
     "generate_biosphere_mapping",
 )
 
-__version__ = "0.4"
+__version__ = "0.4.1"
 
 from .main import generate_biosphere_mapping, generate_technosphere_mapping