diff --git a/package.json b/package.json
index b75a371..a9a4d37 100644
--- a/package.json
+++ b/package.json
@@ -42,12 +42,12 @@
         ]
     },
     "devDependencies": {
-        "@types/node": "^14.0.14",
-        "ajv": "^6.12.2",
+        "@types/node": "^14.6.4",
+        "ajv": "^6.12.4",
         "npm-run-all": "^4.1.5",
-        "ts-node": "^8.10.2",
-        "typescript": "^3.9.5",
-        "vsce": "^1.77.0",
+        "ts-node": "^9.0.0",
+        "typescript": "^4.0.2",
+        "vsce": "^1.79.5",
         "vscode-tmgrammar-test": "0.0.10"
     },
     "scripts": {
diff --git a/yarn.lock b/yarn.lock
index 1625acb..ab8783f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7,15 +7,15 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-12.6.8.tgz#e469b4bf9d1c9832aee4907ba8a051494357c12c"
   integrity sha512-aX+gFgA5GHcDi89KG5keey2zf0WfZk/HAQotEamsK2kbey+8yGKcson0hbK8E+v0NArlCJQCqMP161YhV6ZXLg==
 
-"@types/node@^14.0.14":
-  version "14.0.14"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.0.14.tgz#24a0b5959f16ac141aeb0c5b3cd7a15b7c64cbce"
-  integrity sha512-syUgf67ZQpaJj01/tRTknkMNoBBLWJOBODF0Zm4NrXmiSuxjymFrxnTu1QVYRubhVkRcZLYZG8STTwJRdVm/WQ==
+"@types/node@^14.6.4":
+  version "14.6.4"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.6.4.tgz#a145cc0bb14ef9c4777361b7bbafa5cf8e3acb5a"
+  integrity sha512-Wk7nG1JSaMfMpoMJDKUsWYugliB2Vy55pdjLpmLixeyMi7HizW2I/9QoxsPCkXl3dO+ZOVqPumKaDUv5zJu2uQ==
 
-ajv@^6.12.2:
-  version "6.12.2"
-  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.2.tgz#c629c5eced17baf314437918d2da88c99d5958cd"
-  integrity sha512-k+V+hzjm5q/Mr8ef/1Y9goCmlsK4I6Sm74teeyGvFk1XrOsbsKLjEdrvny42CZ+a8sXbk8KWpY/bDwS+FLL2UQ==
+ajv@^6.12.4:
+  version "6.12.4"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.4.tgz#0614facc4522127fa713445c6bfd3ebd376e2234"
+  integrity sha512-eienB2c9qVQs2KWexhkrdMLVDoIQCz5KSeLxwg9Lzk4DOfBtIK9PQwwufcsn1jjGuf9WZmqPMbGxOzfcuphJCQ==
   dependencies:
     fast-deep-equal "^3.1.1"
     fast-json-stable-stringify "^2.0.0"
@@ -797,10 +797,10 @@ tmp@0.0.29:
   dependencies:
     os-tmpdir "~1.0.1"
 
-ts-node@^8.10.2:
-  version "8.10.2"
-  resolved "https://registry.yarnpkg.com/ts-node/-/ts-node-8.10.2.tgz#eee03764633b1234ddd37f8db9ec10b75ec7fb8d"
-  integrity sha512-ISJJGgkIpDdBhWVu3jufsWpK3Rzo7bdiIXJjQc0ynKxVOVcg2oIrf2H2cejminGrptVc6q6/uynAHNCuWGbpVA==
+ts-node@^9.0.0:
+  version "9.0.0"
+  resolved "https://registry.yarnpkg.com/ts-node/-/ts-node-9.0.0.tgz#e7699d2a110cc8c0d3b831715e417688683460b3"
+  integrity sha512-/TqB4SnererCDR/vb4S/QvSZvzQMJN8daAslg7MeaiHvD8rDZsSfXmNeNumyZZzMned72Xoq/isQljYSt8Ynfg==
   dependencies:
     arg "^4.1.0"
     diff "^4.0.1"
@@ -821,10 +821,10 @@ typed-rest-client@1.2.0:
     tunnel "0.0.4"
     underscore "1.8.3"
 
-typescript@^3.9.5:
-  version "3.9.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.5.tgz#586f0dba300cde8be52dd1ac4f7e1009c1b13f36"
-  integrity sha512-hSAifV3k+i6lEoCJ2k6R2Z/rp/H3+8sdmcn5NrS3/3kE7+RyZXm9aqvxWqjEXHAd8b0pShatpcdMTvEdvAJltQ==
+typescript@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.2.tgz#7ea7c88777c723c681e33bf7988be5d008d05ac2"
+  integrity sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==
 
 uc.micro@^1.0.1, uc.micro@^1.0.5:
   version "1.0.6"
@@ -861,10 +861,10 @@ validate-npm-package-license@^3.0.1:
     spdx-correct "^3.0.0"
     spdx-expression-parse "^3.0.0"
 
-vsce@^1.77.0:
-  version "1.77.0"
-  resolved "https://registry.yarnpkg.com/vsce/-/vsce-1.77.0.tgz#21364d3e63095b2f54e0f185445e8ff6ab614602"
-  integrity sha512-8vOTCI3jGmOm0JJFu/BMAbqxpaSuka4S3hV9E6K5aWBUsDM1SGFExkIxHblnsI8sls43xP61DHorYT+K0F+GFA==
+vsce@^1.79.5:
+  version "1.79.5"
+  resolved "https://registry.yarnpkg.com/vsce/-/vsce-1.79.5.tgz#622d947aed97632d460e68ec774eac41f550102d"
+  integrity sha512-KZFOthGwxWFwoGqwrkzfTfyCZGuniTofnJ1a/dCzQ2HP93u1UuCKrTQyGT+SuGHu8sNqdBYNe0hb9GC3qCN7fg==
   dependencies:
     azure-devops-node-api "^7.2.0"
     chalk "^2.4.2"