diff --git a/CHANGES.rst b/CHANGES.rst
index 75d14dd19..9f3c1cb47 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,6 +7,14 @@
 Changes
 =======
 
+Version 6.4.0 (released 2026-08-12)
+
+- fix(ui): change document verion order e.g "ed. 2nd" to "2nd ed."
+- fix(ui): overlapping text on contents display
+- fix(importer): crashing on large fields
+- add(document type): added thesis document type
+- update(rdm sync): rdm sync supports thesis document type
+
 Version 6.3.1 (released 2026-04-22)
 
 - add(vocabularies): DRO tag
diff --git a/cds_ils/__init__.py b/cds_ils/__init__.py
index 41851886c..6d73b1236 100644
--- a/cds_ils/__init__.py
+++ b/cds_ils/__init__.py
@@ -7,6 +7,6 @@
 
 """CDS-ILS."""
 
-__version__ = "6.3.1"
+__version__ = "6.4.0"
 
 __all__ = ("__version__",)
diff --git a/ui/.env b/ui/.env
index c399e85a1..11931db5d 100644
--- a/ui/.env
+++ b/ui/.env
@@ -2,6 +2,6 @@ REACT_APP_UI_ILS_VERSION=3.0.0
 REACT_APP_INVENIO_VERSION=7.3.0
 REACT_APP_INVENIO_UI_URL=https://127.0.0.1:5000
 REACT_APP_INVENIO_REST_ENDPOINTS_BASE_URL=https://127.0.0.1:5000/api
-REACT_APP_OVERLAY_VERSION=6.3.1
+REACT_APP_OVERLAY_VERSION=6.4.0
 REACT_APP_ENV_NAME=dev
 REACT_APP_INVENIO_MATOMO_ID=undefined