diff --git a/NuGet.config b/NuGet.config
index 0a7e53f45342..1e2458c409ad 100644
--- a/NuGet.config
+++ b/NuGet.config
@@ -4,10 +4,8 @@
     <clear />
     <!--Begin: Package sources managed by Dependency Flow automation. Do not edit the sources below.-->
     <!--  Begin: Package sources from dotnet-runtime -->
-    <add key="darc-int-dotnet-runtime-97d8f4c" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-runtime-97d8f4ca/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-runtime -->
     <!--  Begin: Package sources from dotnet-efcore -->
-    <add key="darc-int-dotnet-efcore-ec0fd22" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-efcore-ec0fd22a/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-efcore -->
     <!--End: Package sources managed by Dependency Flow automation. Do not edit the sources above.-->
     <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" />
@@ -25,10 +23,8 @@
     <clear />
     <!--Begin: Package sources managed by Dependency Flow automation. Do not edit the sources below.-->
     <!--  Begin: Package sources from dotnet-efcore -->
-    <add key="darc-int-dotnet-efcore-ec0fd22" value="true" />
     <!--  End: Package sources from dotnet-efcore -->
     <!--  Begin: Package sources from dotnet-runtime -->
-    <add key="darc-int-dotnet-runtime-97d8f4c" value="true" />
     <!--  End: Package sources from dotnet-runtime -->
     <!--End: Package sources managed by Dependency Flow automation. Do not edit the sources above.-->
   </disabledPackageSources>
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 87294c814110..fe5048027e8e 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -280,22 +280,22 @@
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-runtime</Uri>
       <Sha>1b9707a1fa56abb49ac8a286fd89a91527b6c7d3</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="6.0.0-beta.24204.4">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="6.0.0-beta.24266.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>bd9b4590681e602535ed414e98a17e6ba121dca4</Sha>
+      <Sha>2eab07c3d7b78219d10099b19fafeef2ecae1779</Sha>
       <SourceBuild RepoName="arcade" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Installers" Version="6.0.0-beta.24204.4">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Installers" Version="6.0.0-beta.24266.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>bd9b4590681e602535ed414e98a17e6ba121dca4</Sha>
+      <Sha>2eab07c3d7b78219d10099b19fafeef2ecae1779</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Build.Tasks.Templating" Version="6.0.0-beta.24204.4">
+    <Dependency Name="Microsoft.DotNet.Build.Tasks.Templating" Version="6.0.0-beta.24266.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>bd9b4590681e602535ed414e98a17e6ba121dca4</Sha>
+      <Sha>2eab07c3d7b78219d10099b19fafeef2ecae1779</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="6.0.0-beta.24204.4">
+    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="6.0.0-beta.24266.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>bd9b4590681e602535ed414e98a17e6ba121dca4</Sha>
+      <Sha>2eab07c3d7b78219d10099b19fafeef2ecae1779</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>
diff --git a/eng/Versions.props b/eng/Versions.props
index d7340d0538b7..101d8f76d3ac 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -131,8 +131,8 @@
     <MicrosoftEntityFrameworkCoreVersion>6.0.30</MicrosoftEntityFrameworkCoreVersion>
     <MicrosoftEntityFrameworkCoreDesignVersion>6.0.30</MicrosoftEntityFrameworkCoreDesignVersion>
     <!-- Packages from dotnet/arcade -->
-    <MicrosoftDotNetBuildTasksInstallersVersion>6.0.0-beta.24204.4</MicrosoftDotNetBuildTasksInstallersVersion>
-    <MicrosoftDotNetBuildTasksTemplatingVersion>6.0.0-beta.24204.4</MicrosoftDotNetBuildTasksTemplatingVersion>
+    <MicrosoftDotNetBuildTasksInstallersVersion>6.0.0-beta.24266.4</MicrosoftDotNetBuildTasksInstallersVersion>
+    <MicrosoftDotNetBuildTasksTemplatingVersion>6.0.0-beta.24266.4</MicrosoftDotNetBuildTasksTemplatingVersion>
   </PropertyGroup>
   <!--
 
diff --git a/eng/common/templates-official/job/source-index-stage1.yml b/eng/common/templates-official/job/source-index-stage1.yml
index e96ec3cbe0ed..f04ad04c2b18 100644
--- a/eng/common/templates-official/job/source-index-stage1.yml
+++ b/eng/common/templates-official/job/source-index-stage1.yml
@@ -1,6 +1,6 @@
 parameters:
   runAsPublic: false
-  sourceIndexPackageVersion: 1.0.1-20210614.1
+  sourceIndexPackageVersion: 1.0.1-20240320.1
   sourceIndexPackageSource: https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json
   sourceIndexBuildCommand: powershell -NoLogo -NoProfile -ExecutionPolicy Bypass -Command "eng/common/build.ps1 -restore -build -binarylog -ci"
   preSteps: []
@@ -32,10 +32,10 @@ jobs:
     - ${{ preStep }}
 
   - task: UseDotNet@2
-    displayName: Use .NET Core sdk 3.1
+    displayName: Use .NET 8 SDK
     inputs:
       packageType: sdk
-      version: 3.1.x
+      version: 8.0.x
       installationPath: $(Agent.TempDirectory)/dotnet
       workingDirectory: $(Agent.TempDirectory)
 
diff --git a/eng/common/templates-official/jobs/source-build.yml b/eng/common/templates-official/jobs/source-build.yml
index 2159009dc8e1..b9a1f67b9a9a 100644
--- a/eng/common/templates-official/jobs/source-build.yml
+++ b/eng/common/templates-official/jobs/source-build.yml
@@ -14,7 +14,7 @@ parameters:
   # This is the default platform provided by Arcade, intended for use by a managed-only repo.
   defaultManagedPlatform:
     name: 'Managed'
-    container: 'mcr.microsoft.com/dotnet-buildtools/prereqs:centos-7-3e800f1-20190501005343'
+    container: 'mcr.microsoft.com/dotnet-buildtools/prereqs:centos-7'
 
   # Defines the platforms on which to run build jobs. One job is created for each platform, and the
   # object in this array is sent to the job template as 'platform'. If no platforms are specified,
diff --git a/eng/common/templates/job/source-index-stage1.yml b/eng/common/templates/job/source-index-stage1.yml
index d8990549e809..b710698eb4d4 100644
--- a/eng/common/templates/job/source-index-stage1.yml
+++ b/eng/common/templates/job/source-index-stage1.yml
@@ -1,6 +1,6 @@
 parameters:
   runAsPublic: false
-  sourceIndexPackageVersion: 1.0.1-20210614.1
+  sourceIndexPackageVersion: 1.0.1-20240320.1
   sourceIndexPackageSource: https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json
   sourceIndexBuildCommand: powershell -NoLogo -NoProfile -ExecutionPolicy Bypass -Command "eng/common/build.ps1 -restore -build -binarylog -ci"
   preSteps: []
@@ -30,10 +30,10 @@ jobs:
     - ${{ preStep }}
 
   - task: UseDotNet@2
-    displayName: Use .NET Core sdk 3.1
+    displayName: Use .NET 8 SDK
     inputs:
       packageType: sdk
-      version: 3.1.x
+      version: 8.0.x
       installationPath: $(Agent.TempDirectory)/dotnet
       workingDirectory: $(Agent.TempDirectory)
 
diff --git a/eng/common/templates/jobs/source-build.yml b/eng/common/templates/jobs/source-build.yml
index 00aa98eb3bfd..7c240e654472 100644
--- a/eng/common/templates/jobs/source-build.yml
+++ b/eng/common/templates/jobs/source-build.yml
@@ -14,7 +14,7 @@ parameters:
   # This is the default platform provided by Arcade, intended for use by a managed-only repo.
   defaultManagedPlatform:
     name: 'Managed'
-    container: 'mcr.microsoft.com/dotnet-buildtools/prereqs:centos-7-3e800f1-20190501005343'
+    container: 'mcr.microsoft.com/dotnet-buildtools/prereqs:centos-7'
 
   # Defines the platforms on which to run build jobs. One job is created for each platform, and the
   # object in this array is sent to the job template as 'platform'. If no platforms are specified,
diff --git a/global.json b/global.json
index 933ddeae77d9..e31388cbe293 100644
--- a/global.json
+++ b/global.json
@@ -29,7 +29,7 @@
   },
   "msbuild-sdks": {
     "Yarn.MSBuild": "1.22.19",
-    "Microsoft.DotNet.Arcade.Sdk": "6.0.0-beta.24204.4",
-    "Microsoft.DotNet.Helix.Sdk": "6.0.0-beta.24204.4"
+    "Microsoft.DotNet.Arcade.Sdk": "6.0.0-beta.24266.4",
+    "Microsoft.DotNet.Helix.Sdk": "6.0.0-beta.24266.4"
   }
 }