diff --git a/CHANGELOG.md b/CHANGELOG.md
index 671abfac4a..a747caa2e4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,11 +25,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed Log4J configuration
 - Fix tavern and cucumber tests
 
+## [4.5.2] - 2024-02-22
+## Changed
+- Updated IRS OpenAPI version to 4.5.2
+
 ## [4.5.1] - 2024-02-20
 ### Changed
 - Moved Docker notice to separate file #425
 
-
 ## [4.5.0] - 2024-02-07
 ### Added
 - Added helper script for building documentation locally.
@@ -538,6 +541,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 [Unreleased]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.6.0...HEAD
 [4.6.0]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.5.1...4.6.0
+[4.5.2]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.5.1...4.5.2
 [4.5.1]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.5.0...4.5.1
 [4.5.1]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.5.0...4.5.1
 [4.5.0]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.4.0...4.5.0
diff --git a/charts/irs-helm/CHANGELOG.md b/charts/irs-helm/CHANGELOG.md
index d5cc57894e..6e4dd40f14 100644
--- a/charts/irs-helm/CHANGELOG.md
+++ b/charts/irs-helm/CHANGELOG.md
@@ -10,6 +10,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - Update IRS version to 4.6.0
 
+## [6.14.2] - 2024-02-22
+### Changed
+- Update IRS version to 4.5.2
+
+## [6.14.1] - 2024-02-20
+### Changed
+- Update IRS version to 4.5.1
+
 ## [6.14.0] - 2024-02-07
 ### Added
 - Added configuration parameters `oauth2.semantics.clientId`,`oauth2.semantics.clientSecret`, `oauth2.discovery.clientId`,`oauth2.discovery.clientSecret`, `oauth2.bpdm.clientId`,`oauth2.bpdm.clientSecret`
diff --git a/docs/src/api/irs-api.yaml b/docs/src/api/irs-api.yaml
index eae3930a15..9afa2c32f3 100644
--- a/docs/src/api/irs-api.yaml
+++ b/docs/src/api/irs-api.yaml
@@ -3,7 +3,7 @@ info:
   description: The API of the Item Relationship Service (IRS) for retrieving item
     graphs along the value chain of CATENA-X partners.
   title: IRS API
-  version: "2.1.0"
+  version: "4.5.2"
 servers:
   - url: http://localhost:8080
 security:
diff --git a/irs-api/src/main/java/org/eclipse/tractusx/irs/IrsApplication.java b/irs-api/src/main/java/org/eclipse/tractusx/irs/IrsApplication.java
index c620fde8f9..1481c5e656 100644
--- a/irs-api/src/main/java/org/eclipse/tractusx/irs/IrsApplication.java
+++ b/irs-api/src/main/java/org/eclipse/tractusx/irs/IrsApplication.java
@@ -59,7 +59,7 @@ public class IrsApplication {
     /**
      * The IRS API version.
      */
-    public static final String API_VERSION = "2.1.0";
+    public static final String API_VERSION = "4.5.2";
 
     /**
      * The URL prefix for IRS API URLs.