diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d4b8f8652..7162b38fd0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ _**For better traceability add the corresponding GitHub issue number in each cha
 
 ## [Unreleased]
 
+## [5.1.1] - 2024-05-08
+
 ### Fixed
 
 - Fixed issue in EDR Token renewal #358
@@ -642,7 +644,8 @@ _**For better traceability add the corresponding GitHub issue number in each cha
 ### Unresolved
 - **Select Aspects you need**  You are able to select the needed aspects for which you want to collect the correct endpoint information.
 
-[Unreleased]: https://github.com/eclipse-tractusx/item-relationship-service/compare/5.1.0...HEAD
+[Unreleased]: https://github.com/eclipse-tractusx/item-relationship-service/compare/5.1.1...HEAD
+[5.1.1]: https://github.com/eclipse-tractusx/item-relationship-service/compare/5.1.0...5.1.1
 [5.1.0]: https://github.com/eclipse-tractusx/item-relationship-service/compare/5.0.0...5.1.0
 [5.0.0]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.9.0...5.0.0
 [4.9.0]: https://github.com/eclipse-tractusx/item-relationship-service/compare/4.8.0...4.9.0
diff --git a/charts/item-relationship-service/CHANGELOG.md b/charts/item-relationship-service/CHANGELOG.md
index 99f39e4ca4..6569914a06 100644
--- a/charts/item-relationship-service/CHANGELOG.md
+++ b/charts/item-relationship-service/CHANGELOG.md
@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [7.1.1] - 2024-05-08
+
+### Changed
+- Update IRS version to 5.1.1
+
 ## [7.1.0] - 2024-05-06
 
 ### Fixed
diff --git a/docs/src/api/irs-api.yaml b/docs/src/api/irs-api.yaml
index 99d729841f..41e0d96965 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: 5.1.0
+  version: 5.1.1
 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 4fccef412e..b9f3178696 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 = "5.1.0";
+    public static final String API_VERSION = "5.1.1";
 
     /**
      * The URL prefix for IRS API URLs.