diff --git a/docs/changelog.rst b/docs/changelog.rst
index 42829d936..f511bd758 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -9,6 +9,15 @@ The format is based on `Keep a Changelog`_, and this project adheres to
 Unreleased
 ----------
 
+[0.6.4] 2023-08-22
+------------------
+
+Fixed
+~~~~~
+
+- Bug in :func:`xugrid.snap_to_grid`, which caused an ``IndexError``. 
+  See `#122 <https://github.com/Deltares/xugrid/issues/122>`_.
+
 
 [0.6.3] 2023-08-12
 ------------------
diff --git a/pyproject.toml b/pyproject.toml
index 7d2f99875..3693e0af8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "xugrid"
 description = "Xarray extension for unstructured grids"
 readme = { file = "README.rst", content-type = "text/x-rst" }
-version = "0.6.3"
+version = "0.6.4"
 maintainers = [{ name = "Huite Bootsma", email = "huite.bootsma@deltares.nl" }]
 requires-python = ">=3.7"
 dependencies = [