diff --git a/package.json b/package.json
index 233ae02..376f46f 100644
--- a/package.json
+++ b/package.json
@@ -394,6 +394,7 @@
     "@chemzqm/tsconfig": "^0.0.3",
     "@chemzqm/tslint-config": "^1.0.17",
     "@types/fast-diff": "^1.1.0",
+    "@types/find-up": "^2.1.1",
     "@types/node": "^10.12.1",
     "coc.nvim": "0.0.29",
     "rimraf": "^2.6.2",
@@ -401,6 +402,7 @@
   },
   "dependencies": {
     "fast-diff": "^1.2.0",
+    "find-up": "^3.0.0",
     "semver": "^5.6.0",
     "tslib": "^1.9.3",
     "typescript": "^3.1.3",
diff --git a/src/server/features/bufferSyncSupport.ts b/src/server/features/bufferSyncSupport.ts
index 7fcaf73..7869084 100644
--- a/src/server/features/bufferSyncSupport.ts
+++ b/src/server/features/bufferSyncSupport.ts
@@ -100,6 +100,10 @@ export default class BufferSyncSupport {
         args.scriptKindName = scriptKind
       }
     }
+    if (this.client.apiVersion.gte(API.v230)) {
+      args.projectRootPath = this.client.getWorkspaceRootForResource(document.uri)
+    }
+
     this.client.execute('open', args, false) // tslint:disable-line
     this.requestDiagnostic(uri)
   }
diff --git a/src/server/typescriptService.ts b/src/server/typescriptService.ts
index dc67151..88f8ff7 100644
--- a/src/server/typescriptService.ts
+++ b/src/server/typescriptService.ts
@@ -39,6 +39,7 @@ export interface ITypeScriptServiceClient {
   onTypesInstallerInitializationFailed: Event<Proto.TypesInstallerInitializationFailedEventBody>
   readonly logger: Logger
 
+  getWorkspaceRootForResource(uri: string): string
   normalizePath(resource: Uri): string | null
   asUrl(filepath: string): Uri
   toPath(uri: string): string
diff --git a/src/server/typescriptServiceClient.ts b/src/server/typescriptServiceClient.ts
index 28b4d64..9f0f8d9 100644
--- a/src/server/typescriptServiceClient.ts
+++ b/src/server/typescriptServiceClient.ts
@@ -3,6 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 import cp from 'child_process'
+import findUp from 'find-up'
 import fs from 'fs'
 import os from 'os'
 import path from 'path'
@@ -379,8 +380,8 @@ export default class TypeScriptServiceClient implements ITypeScriptServiceClient
               }
             )
             resolve(handle)
-            this._onTsServerStarted.fire(currentVersion.version)
             this.serviceStarted(resendModels)
+            this._onTsServerStarted.fire(currentVersion.version)
           }
         )
       } catch (e) {
@@ -810,6 +811,13 @@ export default class TypeScriptServiceClient implements ITypeScriptServiceClient
 
     return args
   }
+
+  public getWorkspaceRootForResource(uri: string): string {
+    let u = Uri.parse(uri)
+    if (u.scheme != 'file') return workspace.root
+    let res = findUp.sync(['package.json', '.vim', '.git', '.hg'], { cwd: path.dirname(u.fsPath) })
+    return res ? path.dirname(res) : null
+  }
 }
 
 function getDignosticsKind(event: Proto.Event): DiagnosticKind {
diff --git a/yarn.lock b/yarn.lock
index bf88492..99063c9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -114,6 +114,11 @@
   resolved "https://registry.yarnpkg.com/@types/fast-diff/-/fast-diff-1.1.0.tgz#68c7f476025740b0b6756e51e38b1188dd528b0e"
   integrity sha512-doBwHnPAGdE54EiIFc0/v1qHlRVtNTaxgCZOS9SdSGPq91vx3kUKi5fmz/yivW/RAXEOUJYVXtVFQ6IPpqKRWg==
 
+"@types/find-up@^2.1.1":
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/@types/find-up/-/find-up-2.1.1.tgz#1cd2d240f1ad1f48d32346074724dc3107248a11"
+  integrity sha512-60LC501bQRN9/3yfVaEEMd7IndaufffL56PBRAejPpUrY304Ps1jfnjNqPw5jmM5R8JHWiKBAe5IHzNcPV41AA==
+
 "@types/node@^10.12.1":
   version "10.12.1"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-10.12.1.tgz#da61b64a2930a80fa708e57c45cd5441eb379d5b"