diff --git a/.gitignore b/.gitignore
index 735d79e36..eb1137df6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,5 @@
 *.swo
 *.DS_Store
 .hspec-failures
+/haskell-lsp-types/dist/
+/haskell-lsp-types/dist-newstyle/
diff --git a/haskell-lsp-types/src/Language/Haskell/LSP/TH/ClientCapabilities.hs b/haskell-lsp-types/src/Language/Haskell/LSP/TH/ClientCapabilities.hs
index b965f2060..778d091df 100644
--- a/haskell-lsp-types/src/Language/Haskell/LSP/TH/ClientCapabilities.hs
+++ b/haskell-lsp-types/src/Language/Haskell/LSP/TH/ClientCapabilities.hs
@@ -13,6 +13,8 @@ import Language.Haskell.LSP.TH.MarkupContent
 import Language.Haskell.LSP.TH.Symbol
 import Data.Default
 
+{-# ANN module "HLint: ignore Use newtype instead of data" #-}
+
 -- ---------------------------------------------------------------------
 {-
 New in 3.0
@@ -731,6 +733,7 @@ data DocumentSymbolClientCapabilities =
       _dynamicRegistration :: Maybe Bool
       -- | Specific capabilities for the `SymbolKind`.
     , _symbolKind :: Maybe DocumentSymbolKindClientCapabilities
+    , _hierarchicalDocumentSymbolSupport :: Maybe Bool
     } deriving (Show, Read, Eq)
 
 $(deriveJSON lspOptions ''DocumentSymbolClientCapabilities)
diff --git a/src/Language/Haskell/LSP/Types/Capabilities.hs b/src/Language/Haskell/LSP/Types/Capabilities.hs
index f885ec95f..85e954825 100644
--- a/src/Language/Haskell/LSP/Types/Capabilities.hs
+++ b/src/Language/Haskell/LSP/Types/Capabilities.hs
@@ -188,6 +188,7 @@ capsForVersion (LSPVersion maj min) = ClientCapabilities (Just w) (Just td) Noth
     documentSymbol = DocumentSymbolClientCapabilities
       dynamicReg
       (since 3 4 documentSymbolKind)
+      (since 3 10 True)
 
     documentSymbolKind =
       DocumentSymbolKindClientCapabilities