diff --git a/docs-kits/kits/Circularity_KIT/page-glossary.md b/docs-kits/kits/Circularity_KIT/page-glossary.md
index a56b7fb6b53..d9f79eb6880 100644
--- a/docs-kits/kits/Circularity_KIT/page-glossary.md
+++ b/docs-kits/kits/Circularity_KIT/page-glossary.md
@@ -26,6 +26,7 @@ title: Glossary
 | Compostable                                 | characteristic of a product, packaging or associated component that allows it to biodegrade, generating a relatively homogeneous and stable humus-like substance.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | DIN ISO 14021                                                                                                                                                                                                                                                                     |
 | Consumer                                    | Any natural person who, in contracts covered by this Directive, is acting for purposes which are outside his trade, business, craft or profession                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | 2011/83/EU on conusmer rights                                                                                                                                                                                                                                                     |
 | Co-product                                  | Any of two or more products comning from the same unit process or product system                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | DIN EN ISO 14067, Feb. 2019, p.22                                                                                                                                                                                                                                                 |
+| Core                                  | A core is a previously sold, worn or non-functional product or part, intended for the remanufacturing process. During reverse logistics, a core is protected, handled and identified for remanufacturing to avoid damage and to preserve its value. A core is not waste or scrap and is not intended to be reused before remanufacturing.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | CLEPA, MERA, APRA, ANRAP, FIRM, CPRA                                                                                                                                                                                                                                                 |
 | Cradle-to-gate PCF                          | Part of a product’s full lifecycle, covering all emissions allocated to a product upstream of a company plus all emissions resulting from processes within the company until the product leaves the suppliers' gate                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | WBCSD Pathfinder                                                                                                                                                                                                                                                                  |
 | Cut-off criteria                            | Specification of the amount of material or energy flow or the level of significance of GHG emissions associated with unit processor the product system, to be excluded from a PCF study                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       | DIN EN ISO 14067, Feb. 2019 p.24                                                                                                                                                                                                                                                  |
 | Declared unit                               | Quantity of a product for use as a reference unit in the quantification of a Cradle-to-Gate PCF                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | adapted from DIN EN iso 14067                                                                                                                                                                                                                                                     |
diff --git a/docs-kits/kits/Circularity_KIT/page_changelog.md b/docs-kits/kits/Circularity_KIT/page_changelog.md
index eba03a28e75..38529d5b1cf 100644
--- a/docs-kits/kits/Circularity_KIT/page_changelog.md
+++ b/docs-kits/kits/Circularity_KIT/page_changelog.md
@@ -8,6 +8,12 @@ sidebar_position: 1
 ![Circulairty kit banner](/img/kit-icons/circularity-kit-icon.svg)
 All notable changes to this Kit will be documented in this file.
 
+## [1.3.0] - 17.09.2024
+
+### Added
+
+- add definition of Core to glossary
+
 ## [1.2.0] - 23.07.2024
 
 ### Added