diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b9df09bb..27ef8367c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,12 @@
 # Release Notes
 
-## 0.6.4 (unreleased)
+## 0.6.4 (09.02.2023)
+
+Version `0.6.4` is a small maintenance release with no changes affecting user code.
 
 ### Changes
 
-- `WeldxFile` also shows its JSON widget header representation in an Jupyter hub based environment \[{pull}`854`\].
+- `WeldxFile` also shows its JSON widget header representation in a JupyterHub based environment \[{pull}`854`\].
 
 ### ASDF
 
diff --git a/CITATION.cff b/CITATION.cff
index d427db970..886ce180e 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -1,8 +1,8 @@
 # YAML 1.2
 ---
 title: weldx
-version: 0.6.3
-date-released: 2023-02-02
+version: 0.6.4
+date-released: 2023-02-09
 authors:
   - affiliation: "Bundesanstalt für Materialforschung und -prüfung (BAM)"
     email: cagtay.fabry@bam.de