diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1eaaf3473..42d7d7ce8 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -9,8 +9,8 @@ jobs:
   release:
     runs-on: ubuntu-latest
     env:
-      CSW_VERSION: "4.0.1"
-      ESW_OCS_ENG_UI_VERSION: "0.2.0"
+      CSW_VERSION: "5.0.0-RC1"
+      ESW_OCS_ENG_UI_VERSION: "0.3.0-RC1"
     steps:
       - uses: actions/checkout@v2
       - uses: coursier/setup-action@v1.2.0-M2
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f9c7edec6..ab24d0151 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,9 +11,20 @@ All notable changes to this project will be documented in this file.
 
 ## Upcoming Changes
 
+## [ESW v0.5.0] - 2022-09-15
+
+- upgraded to Java 17
 - Added `subscribeObserveEvents` in EventApi via Gateway.
 - Added `OffsetStart`, `OffsetEnd`, `InputRequestStart` & `InputRequestEnd` sequencer observe events in Kotlin Scripts DSL.
 
+### Documentation
+- Reference paradox documentation: https://tmtsoftware.github.io/esw/0.5.0/
+- Scaladoc: https://tmtsoftware.github.io/esw/0.5.0/api/scala/index.html
+
+### Supporting Releases
+
+<a name="0-4-0-1"></a>1: [ESW v0.5.0-RC1](https://github.com/tmtsoftware/esw/releases/tag/v0.5.0-RC1) - 2022-09-15<br>
+
 ## [ESW v0.4.0] - 2022-02-09
 
 This release contains minor fixes.
diff --git a/README.md b/README.md
index 8504af4f1..679ffdb5b 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,7 @@ See [here](https://tmtsoftware.github.io/esw/) for a detailed description of the
 
 | Date       | Tag        | Source                                                              | Docs                                                               | Assets                                                                             |
 |------------|------------|---------------------------------------------------------------------|--------------------------------------------------------------------|------------------------------------------------------------------------------------|
+| 2022-09-15 | v0.5.0-RC1 | [esw-0.5.0-RC1](https://github.com/tmtsoftware/esw/tree/v0.5.0-RC1) | [esw-0.5.0-RC1 docs](https://tmtsoftware.github.io/esw/0.5.0-RC1/) | [esw-0.5.0-RC1 assets](https://github.com/tmtsoftware/esw/releases/tag/v0.5.0-RC1) |
 | 2022-01-28 | v0.4.0-RC1 | [esw-0.4.0-RC1](https://github.com/tmtsoftware/esw/tree/v0.4.0-RC1) | [esw-0.4.0-RC1 docs](https://tmtsoftware.github.io/esw/0.4.0-RC1/) | [esw-0.4.0-RC1 assets](https://github.com/tmtsoftware/esw/releases/tag/v0.4.0-RC1) |
 | 2021-09-17 | v0.3.0-RC2 | [esw-0.3.0-RC2](https://github.com/tmtsoftware/esw/tree/v0.3.0-RC2) | [esw-0.3.0-RC2 docs](https://tmtsoftware.github.io/esw/0.3.0-RC2/) | [esw-0.3.0-RC2 assets](https://github.com/tmtsoftware/esw/releases/tag/v0.3.0-RC2) |
 | 2021-08-23 | v0.3.0-RC1 | [esw-0.3.0-RC1](https://github.com/tmtsoftware/esw/tree/v0.3.0-RC1) | [esw-0.3.0-RC1 docs](https://tmtsoftware.github.io/esw/0.3.0-RC1/) | [esw-0.3.0-RC1 assets](https://github.com/tmtsoftware/esw/releases/tag/v0.3.0-RC1) |
diff --git a/notes/0.5.0-RC1.markdown b/notes/0.5.0-RC1.markdown
new file mode 100644
index 000000000..547a2f023
--- /dev/null
+++ b/notes/0.5.0-RC1.markdown
@@ -0,0 +1,9 @@
+## ESW - TMT Executive Software v0.5.0-RC1
+
+This is the v0.5.0-RC1 of the TMT Executive Software.
+
+See [CHANGELOG.md](CHANGELOG.md) for details of all releases.
+
+### Documentation
+
+Paradox documentation can be found here: https://tmtsoftware.github.io/esw/0.5.0-RC1/
diff --git a/project/build.properties b/project/build.properties
index f25f355e1..16a7b9144 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1,2 +1,2 @@
 sbt.version=1.6.1
-csw.version=f1a1b5b
+csw.version=879ffae