diff --git a/ChangeLog.md b/ChangeLog.md
index 0b5993e..ee69426 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,11 @@
 # Change log
 
+## 4.9
+
+*2022.04.27*
+
+Bug fix.
+
 ## 4.8
 
 *2022.01.17*
diff --git a/ghcman.psd1 b/ghcman.psd1
index 2263259..04c38ae 100644
--- a/ghcman.psd1
+++ b/ghcman.psd1
@@ -12,7 +12,7 @@
 RootModule = 'ghcman.psm1'
 
 # このモジュールのバージョン番号です。
-ModuleVersion = '4.8'
+ModuleVersion = '4.9'
 
 # サポートされている PSEditions
 # CompatiblePSEditions = @()
@@ -98,7 +98,7 @@ PrivateData = @{
         Tags = @('Haskell', 'GHC', 'PSEdition_Core', 'Windows')
 
         # このモジュールのライセンスの URL。
-        LicenseUri = 'https://github.com/kakkun61/ghcman/blob/4.8/LICENSE'
+        LicenseUri = 'https://github.com/kakkun61/ghcman/blob/4.9/LICENSE'
 
         # このプロジェクトのメイン Web サイトの URL。
         ProjectUri = 'https://github.com/kakkun61/ghcman'
@@ -107,7 +107,7 @@ PrivateData = @{
         # IconUri = ''
 
         # このモジュールの ReleaseNotes
-        ReleaseNotes = 'https://github.com/kakkun61/ghcman/blob/4.8/ChangeLog.md'
+        ReleaseNotes = 'https://github.com/kakkun61/ghcman/blob/4.9/ChangeLog.md'
 
         ExternalModuleDependencies = @('Microsoft.PowerShell.Management', 'Microsoft.PowerShell.Utility')
 
diff --git a/ghcman.psm1 b/ghcman.psm1
index 88ea7ea..6b562c4 100644
--- a/ghcman.psm1
+++ b/ghcman.psm1
@@ -4,7 +4,7 @@ Set-StrictMode -Version Latest
 
 # Constant
 
-Set-Variable ghcmanVersion -Option Constant -Value "4.8"
+Set-Variable ghcmanVersion -Option Constant -Value "4.9"
 Set-Variable systemGlobalDataPath -Option Constant -Value "$Env:ProgramData\ghcman"
 Set-Variable userGlobalDataPath -Option Constant -Value "$Env:APPDATA\ghcman"
 Set-Variable versionPattern -Option Constant -Value '[0-9]+(\.[0-9]+)*'