diff --git a/app/Build/Build Script.csproj b/app/Build/Build Script.csproj
index 558d1cb06..a03729968 100644
--- a/app/Build/Build Script.csproj	
+++ b/app/Build/Build Script.csproj	
@@ -14,7 +14,7 @@
       <PackageReference Include="Cocona" Version="2.2.0" />
 
       <!-- Pins Cocona's transitive Microsoft.Extensions.Hosting 6.0.0, which pulled in the vulnerable System.Text.Json 6.0.0 (GHSA-8g4q-xg66-9fp4) -->
-      <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.20" />
+      <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.21" />
     </ItemGroup>
 
     <ItemGroup>
diff --git a/app/MindWork AI Studio/MindWork AI Studio.csproj b/app/MindWork AI Studio/MindWork AI Studio.csproj
index 484f9fbcb..843611b5f 100644
--- a/app/MindWork AI Studio/MindWork AI Studio.csproj	
+++ b/app/MindWork AI Studio/MindWork AI Studio.csproj	
@@ -63,9 +63,9 @@
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       <PackageReference Include="HtmlAgilityPack" Version="1.12.4" />
       <PackageReference Include="MailKit" Version="4.18.1" />
-      <PackageReference Include="Microsoft.Data.Sqlite.Core" Version="9.0.20" />
-      <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.20" />
-      <PackageReference Include="Microsoft.Extensions.FileProviders.Embedded" Version="9.0.20" />
+      <PackageReference Include="Microsoft.Data.Sqlite.Core" Version="9.0.21" />
+      <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.21" />
+      <PackageReference Include="Microsoft.Extensions.FileProviders.Embedded" Version="9.0.21" />
       <PackageReference Include="MudBlazor" Version="8.15.0" />
       <PackageReference Include="MudBlazor.Markdown" Version="8.11.0" />
       <PackageReference Include="ReverseMarkdown" Version="5.0.0" />
diff --git a/app/MindWork AI Studio/packages.lock.json b/app/MindWork AI Studio/packages.lock.json
index 6a1d0b1ef..9c3b0ca83 100644
--- a/app/MindWork AI Studio/packages.lock.json	
+++ b/app/MindWork AI Studio/packages.lock.json	
@@ -42,43 +42,43 @@
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-          "SQLitePCLRaw.core": "2.1.12",
-          "System.Text.Json": "9.0.20"
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+          "Microsoft.Extensions.FileProviders.Abstractions": "9.0.21"
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       },
       "Microsoft.NET.ILLink.Tasks": {
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@@ -201,103 +201,103 @@
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-          "Microsoft.Extensions.Caching.Memory": "9.0.20",
-          "Microsoft.Extensions.Logging": "9.0.20"
+          "Microsoft.EntityFrameworkCore.Abstractions": "9.0.21",
+          "Microsoft.EntityFrameworkCore.Analyzers": "9.0.21",
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       "Microsoft.EntityFrameworkCore.Relational": {
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         "dependencies": {
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-          "Microsoft.Extensions.Caching.Memory": "9.0.20",
-          "Microsoft.Extensions.Configuration.Abstractions": "9.0.20",
-          "Microsoft.Extensions.Logging": "9.0.20"
+          "Microsoft.EntityFrameworkCore": "9.0.21",
+          "Microsoft.Extensions.Caching.Memory": "9.0.21",
+          "Microsoft.Extensions.Configuration.Abstractions": "9.0.21",
+          "Microsoft.Extensions.Logging": "9.0.21"
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-          "Microsoft.Extensions.Logging": "9.0.20",
-          "SQLitePCLRaw.core": "2.1.12",
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+        "resolved": "9.0.21",
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+          "Microsoft.Extensions.Primitives": "9.0.21"
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       "Microsoft.Extensions.Localization": {
@@ -318,35 +318,35 @@
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-          "Microsoft.Extensions.Logging.Abstractions": "9.0.20",
-          "Microsoft.Extensions.Options": "9.0.20"
+          "Microsoft.Extensions.DependencyInjection": "9.0.21",
+          "Microsoft.Extensions.Logging.Abstractions": "9.0.21",
+          "Microsoft.Extensions.Options": "9.0.21"
         }
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         "dependencies": {
-          "Microsoft.Extensions.DependencyInjection.Abstractions": "9.0.20"
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "9.0.21"
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         "dependencies": {
-          "Microsoft.Extensions.DependencyInjection.Abstractions": "9.0.20",
-          "Microsoft.Extensions.Primitives": "9.0.20"
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "9.0.21",
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       "Microsoft.Extensions.Primitives": {
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       "Microsoft.JSInterop": {
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@@ -404,8 +404,8 @@
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       "sharedtools": {
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diff --git a/app/MindWork AI Studio/wwwroot/changelog/v26.10.1.md b/app/MindWork AI Studio/wwwroot/changelog/v26.10.1.md
index d4467f9a3..fe92f69d7 100644
--- a/app/MindWork AI Studio/wwwroot/changelog/v26.10.1.md	
+++ b/app/MindWork AI Studio/wwwroot/changelog/v26.10.1.md	
@@ -63,4 +63,5 @@
 - Fixed the example configuration for IT departments, which spelled llama.cpp in a way AI Studio does not accept. AI Studio ignored a self-hosted provider set up with that spelling. The example now also names only the self-hosted servers which can create embeddings or transcribe audio.
 - Updated the code contributions on the supporters page, which now thank everyone who has contributed code to AI Studio so far.
 - Upgraded several libraries to improve security.
-- Upgraded to Rust v1.99.0
\ No newline at end of file
+- Upgraded to Rust v1.99.0
+- Upgraded to .NET 9.0.21
\ No newline at end of file
diff --git a/metadata.txt b/metadata.txt
index 90a1ead19..4afa201ab 100644
--- a/metadata.txt
+++ b/metadata.txt
@@ -1,12 +1,12 @@
 26.9.1
 2026-09-28 18:24:50 UTC
 257
-9.0.121 (commit 0882d8715f)
-9.0.20 (commit 3879076d9a)
+9.0.122 (commit 17951ad7c6)
+9.0.21 (commit d280e4fb38)
 1.99.0 (commit b940084d7)
 8.15.0
 2.11.5
 9f102728b59, release
 osx-arm64
 148.0.7763.0
-0.8.0
\ No newline at end of file
+0.8.0