diff --git a/CHANGELOG.md b/CHANGELOG.md
index ecd2bdc709..534673a5fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## [Unreleased]
+
+### Changed
+* Update FCS to 'Allow ParsedHashDirectives to take non string arguments', commit 836d4e0603442d6053c8d439993a022501cae494 [#3096](https://github.com/fsprojects/fantomas/pull/3096)
+
 ## 6.3.9 - 2024-06-10
 
 ### Fixed
diff --git a/Directory.Build.props b/Directory.Build.props
index a23e0c9b5a..7c22db7421 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -40,13 +40,12 @@ Some common use cases include:
         <!-- https://www.gresearch.co.uk/blog/article/improve-nuget-restores-with-static-graph-evaluation/ -->
         <RestoreUseStaticGraphEvaluation>true</RestoreUseStaticGraphEvaluation>
         <ServerGarbageCollection>true</ServerGarbageCollection>
-        <LangVersion>preview</LangVersion>
         <OtherFlags>$(OtherFlags) --test:GraphBasedChecking --test:ParallelOptimization --test:ParallelIlxGen --strict-indentation+</OtherFlags>
     </PropertyGroup>
     
     <!-- Versions -->
     <PropertyGroup>
-        <FCSCommitHash>050271d631956a4e0d0484a583d38236b727a46d</FCSCommitHash>
+        <FCSCommitHash>836d4e0603442d6053c8d439993a022501cae494</FCSCommitHash>
     </PropertyGroup>
     
     <PropertyGroup>
diff --git a/src/Fantomas.Core.Tests/HashDirectiveTests.fs b/src/Fantomas.Core.Tests/HashDirectiveTests.fs
index a6edba73e7..233b10aee6 100644
--- a/src/Fantomas.Core.Tests/HashDirectiveTests.fs
+++ b/src/Fantomas.Core.Tests/HashDirectiveTests.fs
@@ -219,3 +219,45 @@ type FSharpTokenizerColorState =
     | TripleQuoteStringInComment = 14
     | InitialState = 0
 """
+
+[<Test>]
+let ``#help with string`` () =
+    formatSourceString
+        """
+#help  "List.map"
+"""
+        config
+    |> prepend newline
+    |> should
+        equal
+        """
+#help "List.map"
+"""
+
+[<Test>]
+let ``#help without string`` () =
+    formatSourceString
+        """
+#help  List.map
+"""
+        config
+    |> prepend newline
+    |> should
+        equal
+        """
+#help List.map
+"""
+
+[<Test>]
+let ``#nowarn with integer`` () =
+    formatSourceString
+        """
+#nowarn  1182
+"""
+        config
+    |> prepend newline
+    |> should
+        equal
+        """
+#nowarn 1182
+"""
diff --git a/src/Fantomas.Core/ASTTransformer.fs b/src/Fantomas.Core/ASTTransformer.fs
index d653dcc517..69d4cb84a8 100644
--- a/src/Fantomas.Core/ASTTransformer.fs
+++ b/src/Fantomas.Core/ASTTransformer.fs
@@ -100,8 +100,13 @@ let mkParsedHashDirective (creationAide: CreationAide) (ParsedHashDirective(iden
         args
         |> List.map (function
             | ParsedHashDirectiveArgument.String(value, stringKind, range) ->
-                mkConstString creationAide stringKind value range
-            | ParsedHashDirectiveArgument.SourceIdentifier(identifier, _, range) -> stn identifier range)
+                mkConstString creationAide stringKind value range |> Choice1Of2
+            | ParsedHashDirectiveArgument.SourceIdentifier(identifier, _, range) -> stn identifier range |> Choice1Of2
+            | ParsedHashDirectiveArgument.Int32(value, range) ->
+                let text = creationAide.TextFromSource (fun () -> $"%A{value}") range
+                stn text range |> Choice1Of2
+            | ParsedHashDirectiveArgument.Ident(value = ident) -> mkIdent ident |> Choice1Of2
+            | ParsedHashDirectiveArgument.LongIdent(value = lid) -> mkSynLongIdent lid |> Choice2Of2)
 
     ParsedHashDirectiveNode(ident, args, range)
 
diff --git a/src/Fantomas.Core/CodePrinter.fs b/src/Fantomas.Core/CodePrinter.fs
index afc7f76152..38ba58c8c4 100644
--- a/src/Fantomas.Core/CodePrinter.fs
+++ b/src/Fantomas.Core/CodePrinter.fs
@@ -196,8 +196,12 @@ let addSpaceBeforeParenInPattern (node: IdentListNode) (ctx: Context) =
         | _ -> sepSpace ctx
 
 let genParsedHashDirective (phd: ParsedHashDirectiveNode) =
-    !- "#" +> !-phd.Ident +> sepSpace +> col sepSpace phd.Args genSingleTextNode
-    |> genNode phd
+    let genArg =
+        function
+        | Choice1Of2(stn) -> genSingleTextNode stn
+        | Choice2Of2(idl) -> genIdentListNode idl
+
+    !- "#" +> !-phd.Ident +> sepSpace +> col sepSpace phd.Args genArg |> genNode phd
 
 let genUnit (n: UnitNode) =
     genSingleTextNode n.OpeningParen +> genSingleTextNode n.ClosingParen
diff --git a/src/Fantomas.Core/SyntaxOak.fs b/src/Fantomas.Core/SyntaxOak.fs
index 037eca3a9a..c13ecc169e 100644
--- a/src/Fantomas.Core/SyntaxOak.fs
+++ b/src/Fantomas.Core/SyntaxOak.fs
@@ -146,11 +146,16 @@ type Oak(parsedHashDirectives: ParsedHashDirectiveNode list, modulesOrNamespaces
 
     override val Children: Node array = [| yield! nodes parsedHashDirectives; yield! nodes modulesOrNamespaces |]
 
-type ParsedHashDirectiveNode(ident: string, args: SingleTextNode list, range) =
+type ParsedHashDirectiveNode(ident: string, args: Choice<SingleTextNode, IdentListNode> list, range) =
     inherit NodeBase(range)
     member val Ident = ident
     member val Args = args
-    override val Children: Node array = [| yield! nodes args |]
+
+    override val Children: Node array =
+        [| for arg in args do
+               match arg with
+               | Choice1Of2(node) -> node
+               | Choice2Of2(node) -> node |]
 
 type ModuleOrNamespaceHeaderNode
     (