diff --git a/src/FSharpLanguageServer/FSharpLanguageServer.fsproj b/src/FSharpLanguageServer/FSharpLanguageServer.fsproj
index 3b362e0..980daa8 100644
--- a/src/FSharpLanguageServer/FSharpLanguageServer.fsproj
+++ b/src/FSharpLanguageServer/FSharpLanguageServer.fsproj
@@ -21,6 +21,7 @@
   <ItemGroup>
     <PackageReference Include="FSharp.Compiler.Service" Version="39.0.0" />
     <PackageReference Include="HtmlAgilityPack" Version="1.8.4" />
+    <PackageReference Update="FSharp.Core" Version="5.0.1" />
   </ItemGroup>
 
   <ItemGroup>