diff --git a/package.json b/package.json
index d657635ca6..d1c4581bc8 100644
--- a/package.json
+++ b/package.json
@@ -557,7 +557,7 @@
     "@rollup/plugin-node-resolve": "^11.0.1",
     "@rollup/plugin-replace": "^2.3.3",
     "@types/glob": "^7.1.3",
-    "@types/js-yaml": "^3.12.5",
+    "@types/js-yaml": "^4.0.0",
     "@types/lodash": "^4.14.167",
     "@types/minimist": "^1.2.1",
     "@types/mocha": "^8.2.0",
@@ -568,7 +568,7 @@
     "fs-extra": "^9.0.1",
     "glob": "^7.1.6",
     "husky": "^4.3.7",
-    "js-yaml": "^3.14.1",
+    "js-yaml": "^4.0.0",
     "lint-staged": "^10.5.3",
     "minimist": "^1.2.5",
     "mocha": "^8.2.1",
diff --git a/scripts/build_grammar.ts b/scripts/build_grammar.ts
index 8a6d8da541..e746a7e824 100644
--- a/scripts/build_grammar.ts
+++ b/scripts/build_grammar.ts
@@ -1,5 +1,5 @@
 import glob from 'glob';
-import { safeLoad } from 'js-yaml';
+import { load } from 'js-yaml';
 import { writeFileSync, readFileSync } from 'fs';
 import { parse } from 'path';
 import { getGeneratedGrammar } from '../client/grammar';
@@ -9,7 +9,7 @@ glob('syntaxes/**/*.yaml', { nocase: true }, (_, files) => {
     const pathData = parse(file);
     writeFileSync(
       pathData.dir + '/' + pathData.name + '.tmLanguage.json',
-      JSON.stringify(safeLoad(readFileSync(file).toString()), null, 2)
+      JSON.stringify(load(readFileSync(file).toString()), null, 2)
     );
   }
 
diff --git a/yarn.lock b/yarn.lock
index 480c7d5b66..79357d9511 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -132,10 +132,10 @@
     "@types/minimatch" "*"
     "@types/node" "*"
 
-"@types/js-yaml@^3.12.5":
-  version "3.12.5"
-  resolved "https://registry.yarnpkg.com/@types/js-yaml/-/js-yaml-3.12.5.tgz#136d5e6a57a931e1cce6f9d8126aa98a9c92a6bb"
-  integrity sha512-JCcp6J0GV66Y4ZMDAQCXot4xprYB+Zfd3meK9+INSJeVZwJmHAW30BBEEkPzXswMXuiyReUGOP3GxrADc9wPww==
+"@types/js-yaml@^4.0.0":
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/@types/js-yaml/-/js-yaml-4.0.0.tgz#d1a11688112091f2c711674df3a65ea2f47b5dfb"
+  integrity sha512-4vlpCM5KPCL5CfGmTbpjwVKbISRYhduEJvvUWsH5EB7QInhEj94XPZ3ts/9FPiLZFqYO0xoW4ZL8z2AabTGgJA==
 
 "@types/lodash@^4.14.167":
   version "4.14.167"
@@ -268,6 +268,11 @@ argparse@^1.0.7:
   dependencies:
     sprintf-js "~1.0.2"
 
+argparse@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/argparse/-/argparse-2.0.1.tgz#246f50f3ca78a3240f6c997e8a9bd1eac49e4b38"
+  integrity sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==
+
 array-filter@~0.0.0:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/array-filter/-/array-filter-0.0.1.tgz#7da8cf2e26628ed732803581fd21f67cacd2eeec"
@@ -1107,13 +1112,12 @@ js-yaml@3.14.0, js-yaml@^3.13.1:
     argparse "^1.0.7"
     esprima "^4.0.0"
 
-js-yaml@^3.14.1:
-  version "3.14.1"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.14.1.tgz#dae812fdb3825fa306609a8717383c50c36a0537"
-  integrity sha512-okMH7OXXJ7YrN9Ok3/SXrnu4iX9yOk+25nqX4imS2npuvTYDmo/QEZoqwZkYaIDk3jVvBOTOIEgEhaLOynBS9g==
+js-yaml@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-4.0.0.tgz#f426bc0ff4b4051926cd588c71113183409a121f"
+  integrity sha512-pqon0s+4ScYUvX30wxQi3PogGFAlUyH0awepWvwkj4jD4v+ova3RiYw8bmA6x2rDrEaj8i/oWKoRxpVNW+Re8Q==
   dependencies:
-    argparse "^1.0.7"
-    esprima "^4.0.0"
+    argparse "^2.0.1"
 
 json-parse-better-errors@^1.0.1:
   version "1.0.2"