diff --git a/cps-ncmp-rest/docs/openapi/openapi-inventory.yml b/cps-ncmp-rest/docs/openapi/openapi-inventory.yml
index 6c207ee..0aa1d16 100755
--- a/cps-ncmp-rest/docs/openapi/openapi-inventory.yml
+++ b/cps-ncmp-rest/docs/openapi/openapi-inventory.yml
@@ -21,7 +21,7 @@
 info:
   title: NCMP Inventory API
   description: NCMP Inventory API
-  version: "3.5.4"
+  version: "3.5.5"
 servers:
   - url: /ncmpInventory
 components:
diff --git a/cps-ncmp-rest/docs/openapi/openapi.yml b/cps-ncmp-rest/docs/openapi/openapi.yml
index dd2706a..4de505a 100755
--- a/cps-ncmp-rest/docs/openapi/openapi.yml
+++ b/cps-ncmp-rest/docs/openapi/openapi.yml
@@ -22,7 +22,7 @@
 info:
   title: NCMP to CPS Proxy API
   description: NCMP to CPS Proxy API
-  version: "3.5.4"
+  version: "3.5.5"
 servers:
   - url: /ncmp
 components:
diff --git a/cps-rest/docs/openapi/openapi.yml b/cps-rest/docs/openapi/openapi.yml
index 95c3231..d1324f3 100644
--- a/cps-rest/docs/openapi/openapi.yml
+++ b/cps-rest/docs/openapi/openapi.yml
@@ -23,7 +23,7 @@
 info:
   title: ONAP Open API v3 Configuration Persistence Service
   description: Configuration Persistence Service is a Model Driven Generic Database
-  version: "3.5.4"
+  version: "3.5.5"
   contact:
      name: ONAP
      url: "https://onap.readthedocs.io"
diff --git a/docs/api/swagger/cps/openapi.yaml b/docs/api/swagger/cps/openapi.yaml
index fea6848..89a3746 100644
--- a/docs/api/swagger/cps/openapi.yaml
+++ b/docs/api/swagger/cps/openapi.yaml
@@ -9,7 +9,7 @@
     name: Apache 2.0
     url: http://www.apache.org/licenses/LICENSE-2.0
   title: ONAP Open API v3 Configuration Persistence Service
-  version: 3.5.4
+  version: 3.5.5
 servers:
 - url: /cps/api
 security:
diff --git a/docs/api/swagger/ncmp/openapi-inventory.yaml b/docs/api/swagger/ncmp/openapi-inventory.yaml
index ab83ed2..6727b2b 100644
--- a/docs/api/swagger/ncmp/openapi-inventory.yaml
+++ b/docs/api/swagger/ncmp/openapi-inventory.yaml
@@ -2,7 +2,7 @@
 info:
   description: NCMP Inventory API
   title: NCMP Inventory API
-  version: 3.5.4
+  version: 3.5.5
 servers:
 - url: /ncmpInventory
 security:
diff --git a/docs/api/swagger/ncmp/openapi.yaml b/docs/api/swagger/ncmp/openapi.yaml
index e7256c0..d3f813d 100644
--- a/docs/api/swagger/ncmp/openapi.yaml
+++ b/docs/api/swagger/ncmp/openapi.yaml
@@ -2,7 +2,7 @@
 info:
   description: NCMP to CPS Proxy API
   title: NCMP to CPS Proxy API
-  version: 3.5.4
+  version: 3.5.5
 servers:
 - url: /ncmp
 security:
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 85dce21..03c6a15 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -86,6 +86,10 @@
     - `CPS-2478 <https://lf-onap.atlassian.net/browse/CPS-2478>`_ Minimize affect of module and size from Cm Handle Registration and De-Registration use case.
     - `CPS-2507 <https://lf-onap.atlassian.net/browse/CPS-2507>`_ Upgrade liquibase to 4.30.0 version.
 
+Performance
+-----------
+The OSLO delivery brought major performance enhancements by streamlining module sync algorithm. It also optimized caching technology, improving instance efficiency and connection management.
+
 Version: 3.5.4
 ==============