diff --git a/CHANGELOG.md b/CHANGELOG.md
index a88ee15..dfe06df 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+### [0.4.2] - 2024-06-04
+
+* Fix diagonal `MappedMatrixDict` - `col_mapper` is not required
+* Unroll tuples when multiplying `SparseMatrixDict`
+* Switch from `fs` to `fsspec` (following `bw_processing`)
+
 ### [0.4.1] - 2023-12-18
 
 * Allow passing `MappedMatrix` subclass to `MappedMatrixDict`
diff --git a/matrix_utils/__init__.py b/matrix_utils/__init__.py
index 9db0b37..a04ea3d 100644
--- a/matrix_utils/__init__.py
+++ b/matrix_utils/__init__.py
@@ -11,7 +11,7 @@
     "SparseMatrixDict",
 )
 
-__version__ = "0.4.1"
+__version__ = "0.4.2"
 
 from .array_mapper import ArrayMapper
 from .indexers import CombinatorialIndexer, Proxy, RandomIndexer, SequentialIndexer