diff --git a/eng/SourceBuildPrebuiltBaseline.xml b/eng/SourceBuildPrebuiltBaseline.xml
index 4e366ddb46918d..4185d755fa6129 100644
--- a/eng/SourceBuildPrebuiltBaseline.xml
+++ b/eng/SourceBuildPrebuiltBaseline.xml
@@ -6,6 +6,7 @@
     <!-- Allowed due to https://github.com/dotnet/source-build-reference-packages/pull/721 -->
     <UsagePattern IdentityGlob="System.Composition*/*6.*" />
     <UsagePattern IdentityGlob="System.Composition*/*7.*" />
+    <UsagePattern IdentityGlob="System.Composition*/*8.*" />
     <UsagePattern IdentityGlob="Microsoft.CodeAnalysis*/*4.4.*" />
     <UsagePattern IdentityGlob="Microsoft.CodeAnalysis*/*4.8.*" />
 
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 9eaa2efd199a4b..1e093b5af409f1 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -75,9 +75,9 @@
       <SourceBuild RepoName="emsdk" ManagedOnly="true" />
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.24374.1">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.24466.2">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>26ae006620fb4518276b494efac55dbcd8f80224</Sha>
+      <Sha>0cbbe19fd2e94912ae9ab5dd15431ee5193d398c</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
diff --git a/eng/Versions.props b/eng/Versions.props
index 6ea06ef71c1169..e1846035f12eea 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -210,7 +210,7 @@
     <CompilerPlatformTestingMicrosoftVisualBasicVersion>10.2.0</CompilerPlatformTestingMicrosoftVisualBasicVersion>
     <CompilerPlatformTestingMicrosoftVisualStudioCompositionVersion>17.0.46</CompilerPlatformTestingMicrosoftVisualStudioCompositionVersion>
     <!-- Docs -->
-    <MicrosoftPrivateIntellisenseVersion>8.0.0-preview-20230918.1</MicrosoftPrivateIntellisenseVersion>
+    <MicrosoftPrivateIntellisenseVersion>9.0.0-preview-20240830.1</MicrosoftPrivateIntellisenseVersion>
     <!-- Mono Cecil -->
     <MicrosoftDotNetCecilVersion>0.11.5-alpha.24460.1</MicrosoftDotNetCecilVersion>
     <!-- ILCompiler -->