diff --git a/eng/Versions.props b/eng/Versions.props
index fd3fc543421..504cb60a4cb 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -97,7 +97,7 @@
     <SystemThreadingTasksDataflow>$(SystemPackageVersionVersion)</SystemThreadingTasksDataflow>
     <MicrosoftDiaSymReaderPortablePdbVersion>1.6.0</MicrosoftDiaSymReaderPortablePdbVersion>
     <!-- Versions for package groups -->
-    <RoslynVersion>4.15.0-1.25171.14</RoslynVersion>
+    <RoslynVersion>5.0.0-1.25276.102</RoslynVersion>
     <VisualStudioEditorPackagesVersion>17.14.188</VisualStudioEditorPackagesVersion>
     <MicrosoftVisualStudioShellPackagesVersion>17.14.40268</MicrosoftVisualStudioShellPackagesVersion>
     <VisualStudioProjectSystemPackagesVersion>17.14.79</VisualStudioProjectSystemPackagesVersion>
@@ -105,9 +105,10 @@
     <MicrosoftVisualStudioThreadingPackagesVersion>17.14.15</MicrosoftVisualStudioThreadingPackagesVersion>
     <MicrosoftBuildVersion>17.15.0-preview-25278-01</MicrosoftBuildVersion>
     <!-- Roslyn packages -->
+    <MicrosoftCodeAnalysisFeaturesVersion>$(RoslynVersion)</MicrosoftCodeAnalysisFeaturesVersion>
     <MicrosoftCodeAnalysisEditorFeaturesVersion>$(RoslynVersion)</MicrosoftCodeAnalysisEditorFeaturesVersion>
     <MicrosoftCodeAnalysisEditorFeaturesTextVersion>$(RoslynVersion)</MicrosoftCodeAnalysisEditorFeaturesTextVersion>
-    <MicrosoftCodeAnalysisEditorFeaturesWpfVersion>$(RoslynVersion)</MicrosoftCodeAnalysisEditorFeaturesWpfVersion>
+    <MicrosoftCodeAnalysisEditorFeaturesWpfVersion>5.0.0-1.25275.2</MicrosoftCodeAnalysisEditorFeaturesWpfVersion>
     <MicrosoftCodeAnalysisExternalAccessFSharpVersion>$(RoslynVersion)</MicrosoftCodeAnalysisExternalAccessFSharpVersion>
     <MicrosoftCodeAnalysisVersion>$(RoslynVersion)</MicrosoftCodeAnalysisVersion>
     <MicrosoftCodeAnalysisCSharpVersion>$(RoslynVersion)</MicrosoftCodeAnalysisCSharpVersion>
diff --git a/vsintegration/src/FSharp.Editor/FSharp.Editor.fsproj b/vsintegration/src/FSharp.Editor/FSharp.Editor.fsproj
index fbafe3bd839..8ccba61a5af 100644
--- a/vsintegration/src/FSharp.Editor/FSharp.Editor.fsproj
+++ b/vsintegration/src/FSharp.Editor/FSharp.Editor.fsproj
@@ -6,6 +6,7 @@
     <OutputType>Library</OutputType>
     <NoWarn>$(NoWarn);75</NoWarn>
     <NoWarn>$(NoWarn);44</NoWarn><!-- warning about Roslyn API only for F# and TypeScript -->
+    <NoWarn>$(NoWarn);NU1608</NoWarn> <!-- warning about package downgrade -->
     <DisableImplicitFSharpCoreReference>true</DisableImplicitFSharpCoreReference>
     <OtherFlags>$(OtherFlags) --subsystemversion:6.00</OtherFlags>
     <EnableDefaultEmbeddedResourceItems>false</EnableDefaultEmbeddedResourceItems>
@@ -172,10 +173,11 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.CodeAnalysis.Features" Version="$(MicrosoftCodeAnalysisFeaturesVersion)" PrivateAssets="all" ExcludeAssets="runtime;contentFiles;build;analyzers;native" />
     <PackageReference Include="Microsoft.VisualStudio.Interop" Version="$(MicrosoftVisualStudioInteropVersion)" PrivateAssets="all" ExcludeAssets="runtime;contentFiles;build;analyzers;native" />
     <PackageReference Include="Microsoft.Internal.VisualStudio.Interop" Version="$(MicrosoftInternalVisualStudioInteropVersion)" PrivateAssets="all" ExcludeAssets="runtime;contentFiles;build;analyzers;native" />
     <PackageReference Include="Microsoft.CodeAnalysis.EditorFeatures.Text" Version="$(MicrosoftCodeAnalysisEditorFeaturesTextVersion)" PrivateAssets="all" ExcludeAssets="runtime;contentFiles;build;analyzers;native" />
-    <PackageReference Include="Microsoft.CodeAnalysis.EditorFeatures.Wpf" Version="$(MicrosoftCodeAnalysisEditorFeaturesWpfVersion)" PrivateAssets="all" ExcludeAssets="runtime;contentFiles;build;analyzers;native" />
+    <PackageReference Include="Microsoft.CodeAnalysis.EditorFeatures.Wpf" Version="$(MicrosoftCodeAnalysisEditorFeaturesWpfVersion)" PrivateAssets="all" ExcludeAssets="runtime;contentFiles;build;analyzers;native" NoWarn="NU1608" />
     <PackageReference Include="Microsoft.CodeAnalysis.ExternalAccess.FSharp" Version="$(MicrosoftCodeAnalysisExternalAccessFSharpVersion)" PrivateAssets="all" ExcludeAssets="runtime;contentFiles;build;analyzers;native" />
     <PackageReference Include="Microsoft.Composition" Version="$(MicrosoftCompositionVersion)" PrivateAssets="all" ExcludeAssets="runtime;contentFiles;build;analyzers;native" />
     <PackageReference Include="Microsoft.VisualStudio.ComponentModelHost" Version="$(MicrosoftVisualStudioComponentModelHostVersion)" PrivateAssets="all" ExcludeAssets="runtime;contentFiles;build;analyzers;native" />
diff --git a/vsintegration/src/FSharp.Editor/LanguageService/LanguageService.fs b/vsintegration/src/FSharp.Editor/LanguageService/LanguageService.fs
index 4f6136b8db0..b7e34648aed 100644
--- a/vsintegration/src/FSharp.Editor/LanguageService/LanguageService.fs
+++ b/vsintegration/src/FSharp.Editor/LanguageService/LanguageService.fs
@@ -355,12 +355,12 @@ type internal FSharpPackage() as this =
             flushTelemetry ()
 #endif
 
-    override this.RegisterInitializationWork(packageRegistrationTasks: PackageRegistrationTasks) : unit =
-        base.RegisterInitializationWork(packageRegistrationTasks: PackageRegistrationTasks)
+    override this.RegisterInitializeAsyncWork(packageRegistrationTasks: PackageLoadTasks) : unit =
+        base.RegisterInitializeAsyncWork(packageRegistrationTasks)
 
         packageRegistrationTasks.AddTask(
             true,
-            (fun progress _tasks cancellationToken ->
+            (fun _tasks cancellationToken ->
                 foregroundCancellableTask {
                     let! commandService = this.GetServiceAsync(typeof<IMenuCommandService>)
                     let commandService = commandService :?> OleMenuCommandService