diff --git a/javascript/tests/test_decode.js b/javascript/tests/test_decode.js
index 85c1ac9ea1..fdc7b3e9da 100644
--- a/javascript/tests/test_decode.js
+++ b/javascript/tests/test_decode.js
@@ -23,7 +23,7 @@ var yamlTestFiles = utils.getYamlTests();
 describe('test packages based on YAML test files', function () {
   yamlTestFiles.forEach(function (filename) {
     describe(filename, function () {
-      var yamlConfig = yaml.safeLoad(fs.readFileSync(filename));
+      var yamlConfig = yaml.load(fs.readFileSync(filename));
       if ("tests" in yamlConfig) {
         yamlConfig.tests.map(function (testSpec, i) {
           describe('test spec '+i, function () {
diff --git a/javascript/tests/test_dispatch_decoder.js b/javascript/tests/test_dispatch_decoder.js
index 37821545d9..98dba9db06 100644
--- a/javascript/tests/test_dispatch_decoder.js
+++ b/javascript/tests/test_dispatch_decoder.js
@@ -32,7 +32,7 @@ function dispatchee(err, msg) {
 describe('test packages based on YAML descriptors, through the dispatcher', function () {
   yamlTestFiles.forEach(function (filename) {
     describe(filename, function () {
-      var yamlConfig = yaml.safeLoad(fs.readFileSync(filename));
+      var yamlConfig = yaml.load(fs.readFileSync(filename));
       if ("tests" in yamlConfig) {
         yamlConfig.tests.map(function (testSpec, i) {
           describe('test spec '+i, function () {
diff --git a/package-lock.json b/package-lock.json
index be4214522e..08b7448e3b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "assert": "^2.1.0",
         "binary-parser": "^1.7.0",
         "cuint": "^0.2.2",
-        "js-yaml": "^3.13.1",
+        "js-yaml": "^4.1.1",
         "node-int64": "^0.4.0",
         "path": "^0.12.7",
         "stream": "^0.0.3"
@@ -666,13 +666,10 @@
       }
     },
     "node_modules/argparse": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
-      "license": "MIT",
-      "dependencies": {
-        "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==",
+      "license": "Python-2.0"
     },
     "node_modules/asn1": {
       "version": "0.2.6",
@@ -1508,19 +1505,6 @@
         "node": ">=8.0.0"
       }
     },
-    "node_modules/esprima": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
-      "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==",
-      "license": "BSD-2-Clause",
-      "bin": {
-        "esparse": "bin/esparse.js",
-        "esvalidate": "bin/esvalidate.js"
-      },
-      "engines": {
-        "node": ">=4"
-      }
-    },
     "node_modules/esrecurse": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/esrecurse/-/esrecurse-4.3.0.tgz",
@@ -2325,13 +2309,12 @@
       }
     },
     "node_modules/js-yaml": {
-      "version": "3.14.1",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.1.tgz",
-      "integrity": "sha512-okMH7OXXJ7YrN9Ok3/SXrnu4iX9yOk+25nqX4imS2npuvTYDmo/QEZoqwZkYaIDk3jVvBOTOIEgEhaLOynBS9g==",
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.1.tgz",
+      "integrity": "sha512-qQKT4zQxXl8lLwBtHMWwaTcGfFOZviOJet3Oy/xmGk2gZH677CJM9EvtfdSkgWcATZhj/55JZ0rmy3myCT5lsA==",
       "license": "MIT",
       "dependencies": {
-        "argparse": "^1.0.7",
-        "esprima": "^4.0.0"
+        "argparse": "^2.0.1"
       },
       "bin": {
         "js-yaml": "bin/js-yaml.js"
@@ -2566,26 +2549,6 @@
         "node": ">= 14.0.0"
       }
     },
-    "node_modules/mocha/node_modules/argparse": {
-      "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,
-      "license": "Python-2.0"
-    },
-    "node_modules/mocha/node_modules/js-yaml": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.0.tgz",
-      "integrity": "sha512-wpxZs9NoxZaJESJGIZTyDEaYpl0FKSA+FB9aJiyemKhMwkxQg63h4T1KJgUGHpTqPDNRcmmYLugrRjJlBtWvRA==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "argparse": "^2.0.1"
-      },
-      "bin": {
-        "js-yaml": "bin/js-yaml.js"
-      }
-    },
     "node_modules/ms": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -3394,12 +3357,6 @@
         "source-map": "^0.6.0"
       }
     },
-    "node_modules/sprintf-js": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
-      "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
-      "license": "BSD-3-Clause"
-    },
     "node_modules/sshpk": {
       "version": "1.18.0",
       "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.18.0.tgz",
diff --git a/package.json b/package.json
index b855d0cf4b..99a799ec9d 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "assert": "^2.1.0",
     "binary-parser": "^1.7.0",
     "cuint": "^0.2.2",
-    "js-yaml": "^3.13.1",
+    "js-yaml": "^4.1.1",
     "node-int64": "^0.4.0",
     "path": "^0.12.7",
     "stream": "^0.0.3"