diff --git a/CHANGELOG.md b/CHANGELOG.md
index 489ade310..44c3e3d1c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # PowerShell Editor Services Release History
 
+## v3.4.9
+### Thursday, August 11, 2022
+
+- ✨ 🚨 [PowerShellEditorServices #1874](https://github.com/PowerShell/PowerShellEditorServices/pull/1874) - Add end-to-end integration test with Vim.
+- 🐛 ‍🕵️ [vscode-powershell #4112](https://github.com/PowerShell/PowerShellEditorServices/pull/1873) - Fix (and test) regression with PSScriptAnalyzer default rules.
+- ✨ 🚨 [PowerShellEditorServices #1872](https://github.com/PowerShell/PowerShellEditorServices/pull/1872) - Add regression tests for parse error DiagnosticMarkers. (Thanks @fflaten!)
+- ✨ 🚨 [PowerShellEditorServices #1870](https://github.com/PowerShell/PowerShellEditorServices/pull/1870) - Add `DoesNotDuplicateScriptMarkersAsync` regression test.
+- 🐛 ‍🕵️ [PowerShellEditorServices #1869](https://github.com/PowerShell/PowerShellEditorServices/pull/1869) - Fix duplicate DiagnosticMarkers when reopening a file. (Thanks @fflaten!)
+
 ## v3.4.8
 ### Wednesday, August 03, 2022
 
diff --git a/PowerShellEditorServices.Common.props b/PowerShellEditorServices.Common.props
index 502691664..6b972c0d9 100644
--- a/PowerShellEditorServices.Common.props
+++ b/PowerShellEditorServices.Common.props
@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <VersionPrefix>3.4.8</VersionPrefix>
+    <VersionPrefix>3.4.9</VersionPrefix>
     <VersionSuffix></VersionSuffix>
     <Company>Microsoft</Company>
     <Copyright>© Microsoft Corporation.</Copyright>
diff --git a/module/PowerShellEditorServices/PowerShellEditorServices.psd1 b/module/PowerShellEditorServices/PowerShellEditorServices.psd1
index 7c0b224e9..422a21c24 100644
--- a/module/PowerShellEditorServices/PowerShellEditorServices.psd1
+++ b/module/PowerShellEditorServices/PowerShellEditorServices.psd1
@@ -19,7 +19,7 @@ RootModule = if ($PSEdition -eq 'Core')
     }
 
 # Version number of this module.
-ModuleVersion = '3.4.8'
+ModuleVersion = '3.4.9'
 
 # ID used to uniquely identify this module
 GUID = '9ca15887-53a2-479a-9cda-48d26bcb6c47'