diff --git a/src/Core/RevEng.Core.80/RevEng.Core.80.csproj b/src/Core/RevEng.Core.80/RevEng.Core.80.csproj
index 1992c3e70..ba06eee6a 100644
--- a/src/Core/RevEng.Core.80/RevEng.Core.80.csproj
+++ b/src/Core/RevEng.Core.80/RevEng.Core.80.csproj
@@ -30,7 +30,7 @@
     <PackageReference Include="Oracle.EntityFrameworkCore" Version="8.23.50" />
     <PackageReference Include="Pomelo.EntityFrameworkCore.MySql.NetTopologySuite" Version="8.0.2" />
     <PackageReference Include="SimplerSoftware.EntityFrameworkCore.SqlServer.NodaTime" Version="8.0.1" />
-    <PackageReference Include="System.CodeDom" Version="8.0.0" />
+    <PackageReference Include="System.CodeDom" Version="9.0.0" />
     <PackageReference Include="UnicodeInformation" Version="2.7.1" />
   </ItemGroup>
 
diff --git a/src/Core/RevEng.Core.90/RevEng.Core.90.csproj b/src/Core/RevEng.Core.90/RevEng.Core.90.csproj
index 1ea538bc1..3426773eb 100644
--- a/src/Core/RevEng.Core.90/RevEng.Core.90.csproj
+++ b/src/Core/RevEng.Core.90/RevEng.Core.90.csproj
@@ -30,7 +30,7 @@
     <!--<PackageReference Include="EFCore.Snowflake" Version="8.0.8" />-->
     <PackageReference Include="EntityFrameworkCore.Scaffolding.Handlebars" Version="9.0.0-beta1" />
     <PackageReference Include="EntityFrameworkCore.Sqlite.NodaTime" Version="9.1.0" />
-    <PackageReference Include="FirebirdSql.EntityFrameworkCore.Firebird" Version="12.0.0-alpha1" />
+    <PackageReference Include="FirebirdSql.EntityFrameworkCore.Firebird" Version="12.0.0-beta1" />
     <PackageReference Include="Microsoft.Data.SqlClient" Version="5.2.2" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.0" />
@@ -43,7 +43,7 @@
     <PackageReference Include="Oracle.EntityFrameworkCore" Version="9.23.60" />
     <PackageReference Include="Pomelo.EntityFrameworkCore.MySql.NetTopologySuite" Version="9.0.0-preview.2.efcore.9.0.0" />
     <PackageReference Include="SimplerSoftware.EntityFrameworkCore.SqlServer.NodaTime" Version="9.0.0" />
-    <PackageReference Include="System.CodeDom" Version="8.0.0" />
+    <PackageReference Include="System.CodeDom" Version="9.0.0" />
     <PackageReference Include="UnicodeInformation" Version="2.7.1" />
   </ItemGroup>
 
diff --git a/src/GUI/RevEng.Shared/Providers.cs b/src/GUI/RevEng.Shared/Providers.cs
index e63b57199..196bdcd6a 100644
--- a/src/GUI/RevEng.Shared/Providers.cs
+++ b/src/GUI/RevEng.Shared/Providers.cs
@@ -460,6 +460,10 @@ public static List<NuGetPackage> GetNeededPackages(DatabaseType databaseType, bo
                         pkgVersion = "11.0.0";
                         break;
 
+                    case CodeGenerationMode.EFCore9:
+                        pkgVersion = "12.0.0-beta1";
+                        break;
+
                     default: throw new NotImplementedException();
                 }
 
diff --git a/tools/code-sign.md b/tools/code-sign.md
new file mode 100644
index 000000000..bab12093c
--- /dev/null
+++ b/tools/code-sign.md
@@ -0,0 +1,43 @@
+## VSIX code signing
+
+This is notes about using code signing for a VSIX (and also with NuGet packages, not doing this at the moment, to bound to local PC)
+
+### VSIX extension code signing
+
+- Download built .vsix from VSIX Gallery
+
+- Log in to SimplySign Desktop
+
+- Run sign (.NET global tool)
+
+`sign code certificate-store -cfp 0Fxxx -k DEEDXXXX -csp "SimplySign CSP" -t http://time.certum.pl "EF Core Power Tools v2.6.750.vsix" -fl fileslist.txt`
+
+- Upload to MarketPlace
+
+## Notes
+
+fileslist.txt contents:
+EFCorePowerTools.dll
+RevEng.Common.dll
+
+-k = Key container id and -csp both displayed by certutil:
+
+`certutil -user -store my "<certificate serial number>"`
+
+-cfp = cert fingerprint, to get, save as binary .cer, then run this PowerShell command:
+
+`Get-FileHash -Algorithm SHA256 <path to .cer file> | Format-Table -AutoSize`
+
+## Certificate renewal notes
+
+- 365 day cert must be bought again every year
+- select automatic identity validation, using face recognition
+- required documents: 
+  - utility bill with my name and address on it
+  - PDF file with link to GitHub profile (profile has my full name on it)
+
+## Nupkg code signing
+
+dotnet nuget sign "ErikEJ.EntityFramework.SqlServer.6.6.7.nupkg" --certificate-fingerprint xxxx --timestamper http://time.certum.pl
+
+--certificate-fingerprint = certificate thumbprint vist i Certmgr/SimplySign
diff --git a/tools/code-sign.txt b/tools/code-sign.txt
deleted file mode 100644
index 079f1ee9c..000000000
--- a/tools/code-sign.txt
+++ /dev/null
@@ -1,29 +0,0 @@
-VSIX:
-
-1: Log in to SimplySign
-
-2: Export .cer via CertMgr as p7b file
-
-3: Get info from 
-
-certutil -user -store my "thumbprint"
-
-4: Run sign
-
-sign code certificate-store -cfp 0Fxxx -k DEEDXXXX -csp "SimplySign CSP" -t http://time.certum.pl "EF Core Power Tools v2.6.414.vsix" -fl fileslist.txt
-
-fileslist.txt:
-EFCorePowerTools.dll
-RevEng.Common.dll
-
--k = Key container id vist af certutil - certutil -user -store my "<certificate serial number>"
-
--cfp = fingerprint: Get-FileHash -Algorithm SHA256 <path to .cer file> | Format-Table -AutoSize
-
-5: Upload to MarketPlace
-
-NUPKG:
-
-dotnet nuget sign "ErikEJ.EntityFramework.SqlServer.6.6.7.nupkg" --certificate-fingerprint xxxx --timestamper http://time.certum.pl
-
---certificate-fingerprint = certificate thumbprint vist i Certmgr/SimplySign