diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a48dfe..b76c654 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## [0.4] - 2023-12-07
+
+* Add `SparseMatrixDict`
+* Defined matrix multiplication for `MappedMatrixDict`
+
 ## [0.3] - 2023-10-25
 
 * Add `MappedMatrixDict` class for `MultiLCA`
diff --git a/matrix_utils/__init__.py b/matrix_utils/__init__.py
index 6a0bd47..acc5975 100644
--- a/matrix_utils/__init__.py
+++ b/matrix_utils/__init__.py
@@ -11,7 +11,7 @@
     "SparseMatrixDict",
 )
 
-__version__ = "0.3.dev1"
+__version__ = "0.4"
 
 from .array_mapper import ArrayMapper
 from .indexers import CombinatorialIndexer, Proxy, RandomIndexer, SequentialIndexer