diff --git a/CHANGES.rst b/CHANGES.rst
index ce5898852..0a714efd5 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,6 +7,13 @@
 Changes
 =======
 
+Version 6.6.0 (released 2026-10-20)
+
+- change(standards): point links to the library standards page
+- update(sidebar): add id to overwritten sidebar item
+- chore(dependencies): updated dependencies
+- update(changes): update change log to follow deployment
+
 Version 6.5.0 (released 2026-09-15)
 
 - fix(importer): stopped incorrect persisting error messages
diff --git a/cds_ils/__init__.py b/cds_ils/__init__.py
index 37d38d3c8..8bb3ada1d 100644
--- a/cds_ils/__init__.py
+++ b/cds_ils/__init__.py
@@ -7,6 +7,6 @@
 
 """CDS-ILS."""
 
-__version__ = "6.5.0"
+__version__ = "6.6.0"
 
 __all__ = ("__version__",)
diff --git a/ui/.env b/ui/.env
index 78413764e..40cdb3d69 100644
--- a/ui/.env
+++ b/ui/.env
@@ -2,6 +2,6 @@ REACT_APP_UI_ILS_VERSION=3.2.0
 REACT_APP_INVENIO_VERSION=8.0.0
 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=6.5.0
+REACT_APP_OVERLAY_VERSION=6.6.0
 REACT_APP_ENV_NAME=dev
 REACT_APP_INVENIO_MATOMO_ID=undefined