diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 92ebd43c..9b992051 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -3,7 +3,7 @@
 {
 	"name": "CyberChef",
 	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-	"image": "mcr.microsoft.com/devcontainers/javascript-node:1-18-bookworm",
+	"image": "mcr.microsoft.com/devcontainers/javascript-node:1-20-bookworm",
 
 	// Features to add to the dev container. More info: https://containers.dev/features.
 	"features": {
diff --git a/Dockerfile b/Dockerfile
index 856a16ce..7df4184b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@
 # Modifier --platform=$BUILDPLATFORM limits the platform to "BUILDPLATFORM" during buildx multi-platform builds
 # This is because npm "chromedriver" package is not compatiable with all platforms
 # For more info see: https://docs.docker.com/build/building/multi-platform/#cross-compilation
-FROM --platform=$BUILDPLATFORM node:18-alpine AS builder
+FROM --platform=$BUILDPLATFORM node:20-alpine AS builder
 
 WORKDIR /app
 
diff --git a/README.md b/README.md
index cc18a83f..f2981ff7 100755
--- a/README.md
+++ b/README.md
@@ -120,7 +120,7 @@ CyberChef is built to support
 
 ## Node.js support
 
-CyberChef is built to fully support Node.js `v16`. For more information, see the ["Node API" wiki page](https://github.com/gchq/CyberChef/wiki/Node-API)
+CyberChef is built to fully support Node.js `v20`. For more information, see the ["Node API" wiki page](https://github.com/gchq/CyberChef/wiki/Node-API)
 
 
 ## Contributing
diff --git a/babel.config.js b/babel.config.js
index 178271fb..b9efd549 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -16,6 +16,9 @@ module.exports = function(api) {
                     "regenerator": true
                 }
             ]
-        ]
+        ],
+        "generatorOpts": {
+            "importAttributesKeyword": "with"
+        }
     };
 };
diff --git a/package.json b/package.json
index 4c188560..c3d6340d 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   "browserslist": [
     "Chrome >= 50",
     "Firefox >= 38",
-    "node >= 16"
+    "node >= 20"
   ],
   "devDependencies": {
     "@babel/eslint-parser": "^7.28.6",
diff --git a/src/core/Recipe.mjs b/src/core/Recipe.mjs
index b4a10e03..84c91d61 100755
--- a/src/core/Recipe.mjs
+++ b/src/core/Recipe.mjs
@@ -4,7 +4,7 @@
  * @license Apache-2.0
  */
 
-import OperationConfig from "./config/OperationConfig.json" assert {type: "json"};
+import OperationConfig from "./config/OperationConfig.json" with { type: "json" };
 import OperationError from "./errors/OperationError.mjs";
 import Operation from "./Operation.mjs";
 import DishError from "./errors/DishError.mjs";
diff --git a/src/core/lib/Magic.mjs b/src/core/lib/Magic.mjs
index 14111ec7..ad407de6 100644
--- a/src/core/lib/Magic.mjs
+++ b/src/core/lib/Magic.mjs
@@ -1,4 +1,4 @@
-import OperationConfig from "../config/OperationConfig.json" assert {type: "json"};
+import OperationConfig from "../config/OperationConfig.json" with { type: "json" };
 import Utils, { isWorkerEnvironment } from "../Utils.mjs";
 import Recipe from "../Recipe.mjs";
 import Dish from "../Dish.mjs";
diff --git a/src/node/api.mjs b/src/node/api.mjs
index 88b3f834..82b5f61e 100644
--- a/src/node/api.mjs
+++ b/src/node/api.mjs
@@ -10,7 +10,7 @@
 
 import NodeDish from "./NodeDish.mjs";
 import NodeRecipe from "./NodeRecipe.mjs";
-import OperationConfig from "../core/config/OperationConfig.json" assert {type: "json"};
+import OperationConfig from "../core/config/OperationConfig.json" with { type: "json" };
 import { sanitise, removeSubheadingsFromArray, sentenceToCamelCase } from "./apiUtils.mjs";
 import ExcludedOperationError from "../core/errors/ExcludedOperationError.mjs";