diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff9a18b2..5b8e7103 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 1.4.22 (22 September 2021)
+- [#633](https://github.com/WireMock-Net/WireMock.Net/pull/633) - Implement Random Delay [feature] contributed by [StefH](https://github.com/StefH)
+
 # 1.4.21 (16 September 2021)
 - [#631](https://github.com/WireMock-Net/WireMock.Net/pull/631) - Add WireMock.org RestClient [feature] contributed by [StefH](https://github.com/StefH)
 
diff --git a/Directory.Build.props b/Directory.Build.props
index f8f98a16..4a8af1de 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -4,7 +4,7 @@
     </PropertyGroup>
 
     <PropertyGroup>
-        <VersionPrefix>1.4.21</VersionPrefix>
+        <VersionPrefix>1.4.22</VersionPrefix>
         <PackageReleaseNotes>See CHANGELOG.md</PackageReleaseNotes>
         <PackageIcon>WireMock.Net-Logo.png</PackageIcon>
         <PackageProjectUrl>https://github.com/WireMock-Net/WireMock.Net</PackageProjectUrl>
diff --git a/Generate-ReleaseNotes.cmd b/Generate-ReleaseNotes.cmd
index 84b0ec0f..e7704113 100644
--- a/Generate-ReleaseNotes.cmd
+++ b/Generate-ReleaseNotes.cmd
@@ -1,6 +1,6 @@
 rem https://github.com/StefH/GitHubReleaseNotes
 
-SET version=1.4.21
+SET version=1.4.22
 
 GitHubReleaseNotes --output CHANGELOG.md --skip-empty-releases --exclude-labels question invalid doc duplicate --version %version%