diff --git a/gulpfile.js b/gulpfile.js
index 4e8baee..909deb6 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -41,7 +41,7 @@ gulp.task('build-manifest', () => (
   gulp.src('keywords-voices.yml')
     .pipe(
       transform((file) => {
-        const voiceConfig = yaml.safeLoad(file.contents.toString())
+        const voiceConfig = yaml.load(file.contents.toString())
         const { languages, contributes } = voiceConfig
 
         const manifest = {
diff --git a/package-lock.json b/package-lock.json
index 95d60e4..be753f8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -135,13 +135,10 @@
       "dev": true
     },
     "argparse": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
-      "dev": true,
-      "requires": {
-        "sprintf-js": "~1.0.2"
-      }
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
+      "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
+      "dev": true
     },
     "arr-diff": {
       "version": "4.0.0",
@@ -1415,12 +1412,6 @@
       "integrity": "sha512-U1suiZ2oDVWv4zPO56S0NcR5QriEahGtdN2OR6FiOG4WJvcjBVFB0qI4+eKoWFH483PKGuLuu6V8Z4T5g63UVA==",
       "dev": true
     },
-    "esprima": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
-      "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==",
-      "dev": true
-    },
     "expand-brackets": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-2.1.4.tgz",
@@ -2674,13 +2665,12 @@
       "dev": true
     },
     "js-yaml": {
-      "version": "3.14.0",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.0.tgz",
-      "integrity": "sha512-/4IbIeHcD9VMHFqDR/gQ7EdZdLimOvW2DdcxFjdyyZ9NsbS+ccrXqVWDtab/lRl5AlUqmpBx8EhPaWR+OtY17A==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.0.0.tgz",
+      "integrity": "sha512-pqon0s+4ScYUvX30wxQi3PogGFAlUyH0awepWvwkj4jD4v+ova3RiYw8bmA6x2rDrEaj8i/oWKoRxpVNW+Re8Q==",
       "dev": true,
       "requires": {
-        "argparse": "^1.0.7",
-        "esprima": "^4.0.0"
+        "argparse": "^2.0.1"
       }
     },
     "json-parse-better-errors": {
@@ -4018,12 +4008,6 @@
         "through2": "^2.0.2"
       }
     },
-    "sprintf-js": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
-      "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
-      "dev": true
-    },
     "stack-trace": {
       "version": "0.0.10",
       "resolved": "https://registry.npmjs.org/stack-trace/-/stack-trace-0.0.10.tgz",
diff --git a/package.json b/package.json
index 17c4d5f..8034a28 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "esm": "3.2.25",
     "gulp": "4.0.2",
     "gulp-zip": "5.0.2",
-    "js-yaml": "3.14.0",
+    "js-yaml": "4.0.0",
     "rimraf": "3.0.2",
     "standard-version": "8.0.1"
   },