diff --git a/package-lock.json b/package-lock.json
index ce0f081..9c46b90 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2057,6 +2057,12 @@
         "lodash": "^4.17.15",
         "yargs": "^13.3.0"
       }
+    },
+    "yarn": {
+      "version": "1.22.4",
+      "resolved": "https://registry.npmjs.org/yarn/-/yarn-1.22.4.tgz",
+      "integrity": "sha512-oYM7hi/lIWm9bCoDMEWgffW8aiNZXCWeZ1/tGy0DWrN6vmzjCXIKu2Y21o8DYVBUtiktwKcNoxyGl/2iKLUNGA==",
+      "dev": true
     }
   }
 }
diff --git a/package.json b/package.json
index 409d2bc..e46ccd9 100644
--- a/package.json
+++ b/package.json
@@ -74,7 +74,8 @@
     "sinon": "^9.0.2",
     "tslint": "^6.1.1",
     "typescript": "^3.8.3",
-    "vscode-test": "^1.3.0"
+    "vscode-test": "^1.3.0",
+    "yarn": "^1.22.4"
   },
   "engines": {
     "vscode": "^1.41.0"
diff --git a/thirdpartynotices.txt b/thirdpartynotices.txt
deleted file mode 100644
index d00316e..0000000
--- a/thirdpartynotices.txt
+++ /dev/null
@@ -1,35 +0,0 @@
-THIRD-PARTY SOFTWARE NOTICES AND INFORMATION
-For Microsoft vscode-go
- 
-This project incorporates material from the projects listed below.  The original copyright notice 
-and the license under which Microsoft received such material are set out below. Microsoft reserves 
-all other rights not expressly granted, whether by implication, estoppel or otherwise.
-
-
-1. json-rpc2 version 1.0.2 (https://github.com/pocesar/node-jsonrpc2)
-
-The MIT License
-
-       Copyright (C) 2009 Eric Florenzano <eflorenzano.com/aboutme/> and
-                          Ryan Tomayko <tomayko.com/about>
- 
-Permission  is  hereby granted, free of charge, to any person ob-
-taining a copy of  this  software  and  associated  documentation
-files  (the "Software"), to deal in the Software without restric-
-tion, including without limitation the rights to use, copy, modi-
-fy, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is  fur-
-nished to do so, subject to the following conditions:
- 
-The  above  copyright  notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
- 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF  ANY  KIND,
-EXPRESS  OR  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
-OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE  AND  NONIN-
-FRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER  IN  AN
-ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN  THE
-SOFTWARE.
-
diff --git a/tools/license.sh b/tools/license.sh
new file mode 100755
index 0000000..9647e1f
--- /dev/null
+++ b/tools/license.sh
@@ -0,0 +1,70 @@
+#!/bin/bash
+
+# Copyright 2020 The Go Authors. All rights reserved.
+# Licensed under the MIT License. See LICENSE in the project root for license information.
+
+set -euo pipefail
+
+root_dir() {
+  local script_name="${0}"
+  local script_dir=$(dirname "${script_name}")
+  local parent_dir=$(cd "${script_dir}/.." && pwd)
+  echo "${parent_dir}"
+}
+
+ROOT="$(root_dir)"
+cd "${ROOT}"  # always run from the root directory.
+
+WORKTREE="$(mktemp -d)"
+BRANCH="license-gen-$(date +%Y%m%d%H%M%S)"
+
+git fetch
+git worktree add --track -b "${BRANCH}" "${WORKTREE}" origin/master
+
+cd "${WORKTREE}"
+export GIT_GOFMT_HOOK=off
+
+YARN="${ROOT}/node_modules/.bin/yarn"
+
+ALL_LICENSES=$(
+  $YARN licenses list --json --no-progress 2>/dev/null|
+  jq 'select(.type == "table") | .data.body | map( {name: .[0], version: .[1], license: .[2], url: .[3], verndor: .[4], vendorName: .[5]} )')
+
+NG=$(echo "${ALL_LICENSES}" | jq '
+{
+  "Apache-2.0": 1,
+  "BSD-2-Clause": 1,
+  "BSD-3-Clause": 1,
+  "ISC": 1,
+  "MIT": 1,
+  "Unlicense": 1,
+  "0BSD": 1,
+  "(Unlicense OR Apache-2.0)": 1,
+} as $allowed_licenses |
+{
+  "json-schema@0.2.3": 1,
+} as $allow_list |
+.[] | select(.license | in($allowed_licenses) | not)
+| select((.name+"@"+.version) | in($allow_list) | not) ')
+
+if [ -z "${NG}" ];
+then
+  echo "PASSED license check"
+else
+  echo "FAILED license check. The following dependencies need manual check: ${NG}" &&
+  echo "WORKTREE=${WORKTREE}" &&
+  exit 1
+fi
+
+LICENSEFILE="LICENSE.prod"
+cat LICENSE > "${LICENSEFILE}"
+printf "\n\n" >> "${LICENSEFILE}"
+"${YARN}" licenses generate-disclaimer --prod >> "${LICENSEFILE}"
+
+if [[ -f thirdpartynotices.txt ]]
+then
+  printf "\n" >> "${LICENSEFILE}"
+  cat thirdpartynotices.txt >> "${LICENSEFILE}"
+fi
+
+cd - && mv "${WORKTREE}/${LICENSEFILE}" . && git worktree remove "${WORKTREE}" -f