diff --git a/package-lock.json b/package-lock.json
index b2660bb0b0..eabf953c3c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -57,6 +57,7 @@
         "jquery": "3.7.1",
         "js-ascon": "^1.3.0",
         "js-sha3": "^0.12.0",
+        "js-yaml": "^5.2.3",
         "jsesc": "^3.1.0",
         "json5": "^2.2.3",
         "jsonata": "^2.2.2",
@@ -2813,6 +2814,29 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/@eslint/eslintrc/node_modules/js-yaml": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.3.1.tgz",
+      "integrity": "sha512-CY6crGq313MX8GkwvB7tzgp99vjQxY1++5y10/BKN/GUfHqWaOGQMNZkBvqSzsZKWk/ijwHlWzzkLulsGHhjWQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/puzrin"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/nodeca"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "argparse": "^2.0.1"
+      },
+      "bin": {
+        "js-yaml": "bin/js-yaml.js"
+      }
+    },
     "node_modules/@eslint/js": {
       "version": "9.39.5",
       "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.39.5.tgz",
@@ -7363,6 +7387,29 @@
         "node": ">=6"
       }
     },
+    "node_modules/cosmiconfig/node_modules/js-yaml": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.3.1.tgz",
+      "integrity": "sha512-CY6crGq313MX8GkwvB7tzgp99vjQxY1++5y10/BKN/GUfHqWaOGQMNZkBvqSzsZKWk/ijwHlWzzkLulsGHhjWQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/puzrin"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/nodeca"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "argparse": "^2.0.1"
+      },
+      "bin": {
+        "js-yaml": "bin/js-yaml.js"
+      }
+    },
     "node_modules/crc-32": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/crc-32/-/crc-32-1.2.2.tgz",
@@ -12489,10 +12536,9 @@
       "license": "MIT"
     },
     "node_modules/js-yaml": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.3.0.tgz",
-      "integrity": "sha512-1td788aAnnZ5qs7V2QIRl1owjtYpbKt749Y3xauqQgwIIGF/xXWz1wMTEBx5O3LK3lXLVuqXPdPxj2BoFHaW9Q==",
-      "dev": true,
+      "version": "5.2.3",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-5.2.3.tgz",
+      "integrity": "sha512-n+mUVyUX5bVv7G/G2zyIHOhdxfuU1dY2NOFzTQUWiMUbFss8b57NFlgCCaggU78wSw5KVS9cllzeLyzyR+n5nw==",
       "funding": [
         {
           "type": "github",
@@ -12508,7 +12554,7 @@
         "argparse": "^2.0.1"
       },
       "bin": {
-        "js-yaml": "bin/js-yaml.js"
+        "js-yaml": "bin/js-yaml.mjs"
       }
     },
     "node_modules/jsdoc-type-pratt-parser": {
@@ -13622,6 +13668,29 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/mocha/node_modules/js-yaml": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.3.1.tgz",
+      "integrity": "sha512-CY6crGq313MX8GkwvB7tzgp99vjQxY1++5y10/BKN/GUfHqWaOGQMNZkBvqSzsZKWk/ijwHlWzzkLulsGHhjWQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/puzrin"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/nodeca"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "argparse": "^2.0.1"
+      },
+      "bin": {
+        "js-yaml": "bin/js-yaml.js"
+      }
+    },
     "node_modules/mocha/node_modules/minimatch": {
       "version": "5.1.9",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-5.1.9.tgz",
diff --git a/package.json b/package.json
index c8e4c491a9..8cd81c9e4b 100644
--- a/package.json
+++ b/package.json
@@ -142,6 +142,7 @@
     "jquery": "3.7.1",
     "js-ascon": "^1.3.0",
     "js-sha3": "^0.12.0",
+    "js-yaml": "^5.2.3",
     "jsesc": "^3.1.0",
     "json5": "^2.2.3",
     "jsonata": "^2.2.2",
diff --git a/src/core/operations/JSONtoYAML.mjs b/src/core/operations/JSONtoYAML.mjs
index 0d4cc626bc..39d7a94928 100644
--- a/src/core/operations/JSONtoYAML.mjs
+++ b/src/core/operations/JSONtoYAML.mjs
@@ -6,7 +6,7 @@
 
 import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
-import YAML from "yaml";
+import { dump } from "js-yaml";
 
 /**
  * JSON to YAML operation
@@ -35,9 +35,9 @@ class JSONtoYAML extends Operation {
      */
     run(input, args) {
         try {
-            return YAML.stringify(input);
+            return dump(input);
         } catch (err) {
-            throw new OperationError("Test");
+            throw new OperationError("Unable to stringify YAML: " + err);
         }
     }
 
diff --git a/src/core/operations/YAMLToJSON.mjs b/src/core/operations/YAMLToJSON.mjs
index 5b98657523..c2e201f0e4 100644
--- a/src/core/operations/YAMLToJSON.mjs
+++ b/src/core/operations/YAMLToJSON.mjs
@@ -6,7 +6,8 @@
 
 import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
-import jsYaml from "js-yaml";
+import { load } from "js-yaml";
+
 /**
  * YAML to JSON operation
  */
@@ -34,7 +35,7 @@ class YAMLToJSON extends Operation {
      */
     run(input, args) {
         try {
-            return jsYaml.load(input);
+            return load(input);
         } catch (err) {
             throw new OperationError("Unable to parse YAML: " + err);
         }