diff --git a/build/Modules/Umbraco.Build/Set-UmbracoVersion.ps1 b/build/Modules/Umbraco.Build/Set-UmbracoVersion.ps1
index 22130a8a51..93e679ad04 100644
--- a/build/Modules/Umbraco.Build/Set-UmbracoVersion.ps1
+++ b/build/Modules/Umbraco.Build/Set-UmbracoVersion.ps1
@@ -27,7 +27,7 @@ function Set-UmbracoVersion
   }
   
   # validate input
-  $ok = [Regex]::Match($version, "^[0-9]+\.[0-9]+\.[0-9]+(\-[a-z0-9]+)?(\+[0-9]+)?$")
+  $ok = [Regex]::Match($version, "^[0-9]+\.[0-9]+\.[0-9]+(\-[a-z0-9\.]+)?(\+[0-9]+)?$")
   if (-not $ok.Success)
   {
     Write-Error "Invalid version $version"
diff --git a/src/SolutionInfo.cs b/src/SolutionInfo.cs
index 531de848f8..383316e16b 100644
--- a/src/SolutionInfo.cs
+++ b/src/SolutionInfo.cs
@@ -17,4 +17,4 @@ using System.Resources;
 
 // these are FYI and changed automatically
 [assembly: AssemblyFileVersion("8.0.0")]
-[assembly: AssemblyInformationalVersion("8.0.0-alpha0025")]
+[assembly: AssemblyInformationalVersion("8.0.0-alpha.26")]
diff --git a/src/Umbraco.Core/Configuration/UmbracoVersion.cs b/src/Umbraco.Core/Configuration/UmbracoVersion.cs
index 48fcd64c5d..752b797ea5 100644
--- a/src/Umbraco.Core/Configuration/UmbracoVersion.cs
+++ b/src/Umbraco.Core/Configuration/UmbracoVersion.cs
@@ -21,7 +21,7 @@ namespace Umbraco.Core.Configuration
         /// <summary>
         /// Gets the version comment of the executing code (eg "beta").
         /// </summary>
-        public static string CurrentComment => "alpha0025";
+        public static string CurrentComment => "alpha.26";
 
         /// <summary>
         /// Gets the assembly version of Umbraco.Code.dll.