diff --git a/hls-stan-plugin.cabal b/hls-stan-plugin.cabal
--- a/hls-stan-plugin.cabal
+++ b/hls-stan-plugin.cabal
@@ -1,6 +1,6 @@
 cabal-version: 2.4
 name:          hls-stan-plugin
-version:            2.0.0.1
+version:       2.1.0.0
 synopsis:      Stan integration plugin with Haskell Language Server
 description:
   Please see the README on GitHub at <https://github.com/haskell/haskell-language-server#readme>
@@ -74,7 +74,7 @@
     , filepath
     , hls-stan-plugin
     , hls-plugin-api
-    , hls-test-utils      == 2.0.0.1
+    , hls-test-utils      == 2.1.0.0
     , lens
     , lsp-types
     , text
diff --git a/src/Ide/Plugin/Stan.hs b/src/Ide/Plugin/Stan.hs
--- a/src/Ide/Plugin/Stan.hs
+++ b/src/Ide/Plugin/Stan.hs
@@ -13,6 +13,7 @@
 import           Data.Maybe                     (fromJust, mapMaybe)
 import qualified Data.Text                      as T
 import           Development.IDE
+import           Development.IDE                (Diagnostic (_codeDescription))
 import           Development.IDE.Core.Rules     (getHieFile,
                                                  getSourceFileSource)
 import           Development.IDE.Core.RuleTypes (HieAstResult (..))
@@ -33,7 +34,7 @@
                                                  defaultConfigDescriptor,
                                                  defaultPluginDescriptor,
                                                  pluginEnabledConfig)
-import qualified Language.LSP.Types             as LSP
+import qualified Language.LSP.Protocol.Types    as LSP
 import           Stan.Analysis                  (Analysis (..), runAnalysis)
 import           Stan.Category                  (Category (..))
 import           Stan.Core.Id                   (Id (..))
@@ -110,11 +111,13 @@
           ShowDiag,
           LSP.Diagnostic
             { _range = realSrcSpanToRange observationSrcSpan,
-              _severity = Just LSP.DsHint,
+              _severity = Just LSP.DiagnosticSeverity_Hint,
               _code = Just (LSP.InR $ unId (inspectionId inspection)),
               _source = Just "stan",
               _message = message,
               _relatedInformation = Nothing,
-              _tags = Nothing
+              _tags = Nothing,
+              _codeDescription = Nothing,
+              _data_ = Nothing
             }
           )
diff --git a/test/Main.hs b/test/Main.hs
--- a/test/Main.hs
+++ b/test/Main.hs
@@ -10,7 +10,7 @@
 import qualified Data.Text               as T
 import qualified Data.Text.IO            as T
 import qualified Ide.Plugin.Stan         as Stan
-import qualified Language.LSP.Types.Lens as L
+import qualified Language.LSP.Protocol.Lens as L
 import           System.FilePath
 import           Test.Hls
 
@@ -28,7 +28,7 @@
           liftIO $ do
             length diags @?= 1
             reduceDiag ^. L.range @?= Range (Position 0 0) (Position 3 19)
-            reduceDiag ^. L.severity @?= Just DsHint
+            reduceDiag ^. L.severity @?= Just DiagnosticSeverity_Hint
             let expectedPrefix = " ✲ Name:        "
             assertBool "" $ T.isPrefixOf expectedPrefix (reduceDiag ^. L.message)
             reduceDiag ^. L.source @?= Just "stan"