diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 609c3087..fad99b2d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false # if tests for one version fail, continue with the rest
       matrix:
-        node-version: [16.x, 18.x, '20.x']
+        node-version: [18.x, 20.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     name: Node ${{ matrix.node-version }}
diff --git a/README.md b/README.md
index c70e6822..0ae026c8 100644
--- a/README.md
+++ b/README.md
@@ -33,9 +33,9 @@ OpenPGP.js [![BrowserStack Status](https://automate.browserstack.com/badge.svg?b
 
 ### Platform Support
 
-* The `dist/openpgp.min.js` (or `.mjs`) bundle works with recent versions of Chrome, Firefox, Edge and Safari 13+.
+* The `dist/openpgp.min.js` (or `.mjs`) bundle works with recent versions of Chrome, Firefox, Edge and Safari 14+.
 
-* The `dist/node/openpgp.min.mjs` (or `.cjs`) bundle works in Node.js v16+: it is used by default when you `import ... from 'openpgp'` (resp. `require('openpgp')`).
+* The `dist/node/openpgp.min.mjs` (or `.cjs`) bundle works in Node.js v18+: it is used by default when you `import ... from 'openpgp'` (resp. `require('openpgp')`).
 
 * Streaming support: the latest versions of Chrome, Firefox, Edge and Safari implement the
 [Streams specification](https://streams.spec.whatwg.org/), including `TransformStream`s.
diff --git a/package-lock.json b/package-lock.json
index c0236407..ca74ff82 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,7 @@
         "@openpgp/jsdoc": "^3.6.11",
         "@openpgp/seek-bzip": "^1.0.5-git",
         "@openpgp/tweetnacl": "^1.0.4-1",
-        "@openpgp/web-stream-tools": "~0.1.2",
+        "@openpgp/web-stream-tools": "~0.1.3",
         "@rollup/plugin-alias": "^5.1.0",
         "@rollup/plugin-commonjs": "^25.0.7",
         "@rollup/plugin-node-resolve": "^15.2.3",
@@ -56,11 +56,11 @@
         "ts-node": "^10.9.2",
         "tslib": "^2.6.2",
         "tsx": "^4.10.4",
-        "typescript": "^5.4.5",
-        "web-streams-polyfill": "^3.3.3"
+        "typescript": "^5.5.2",
+        "web-streams-polyfill": "^4.0.0"
       },
       "engines": {
-        "node": ">= 16.5.0"
+        "node": ">= 18.0.0"
       }
     },
     "node_modules/@babel/code-frame": {
@@ -915,12 +915,12 @@
       "dev": true
     },
     "node_modules/@openpgp/web-stream-tools": {
-      "version": "0.1.2",
-      "resolved": "https://registry.npmjs.org/@openpgp/web-stream-tools/-/web-stream-tools-0.1.2.tgz",
-      "integrity": "sha512-uyTIFj6kjYMmeTv1bTIUcaTjC34ewpHny3XE+CvRCWGom642YCtIfd+6JFdemPgp18ZZc/u11D1SU16lpH3l0w==",
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/@openpgp/web-stream-tools/-/web-stream-tools-0.1.3.tgz",
+      "integrity": "sha512-mT/ds43cH6c+AO5RFpxs+LkACr7KjC3/dZWHrP6KPrWJu4uJ/XJ+p7telaoYiqUfdjiiIvdNSOfhezW9fkmboQ==",
       "dev": true,
       "engines": {
-        "node": ">= 16.5.0"
+        "node": ">= 18.0.0"
       },
       "peerDependencies": {
         "typescript": ">=4.2"
@@ -8136,9 +8136,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.4.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.4.5.tgz",
-      "integrity": "sha512-vcI4UpRgg81oIRUFwR0WSIHKt11nJ7SAVlYNIu+QpqeyXP+gpQJy/Z4+F0aGxSE4MqwjyXvW/TzgkLAx2AGHwQ==",
+      "version": "5.5.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.5.2.tgz",
+      "integrity": "sha512-NcRtPEOsPFFWjobJEtfihkLCZCXZt/os3zf8nTxjVH3RvTSxjrCamJpbExGvYOF+tFHc3pA65qpdwPbzjohhew==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -8320,9 +8320,9 @@
       }
     },
     "node_modules/web-streams-polyfill": {
-      "version": "3.3.3",
-      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-3.3.3.tgz",
-      "integrity": "sha512-d2JWLCivmZYTSIoge9MsgFCZrt571BikcWGYkjC1khllbTeDlGqZ2D8vD8E/lJa8WGWbb7Plm8/XJYV7IJHZZw==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-4.0.0.tgz",
+      "integrity": "sha512-0zJXHRAYEjM2tUfZ2DiSOHAa2aw1tisnnhU3ufD57R8iefL+DcdJyRBRyJpG+NUimDgbTI/lH+gAE1PAvV3Cgw==",
       "dev": true,
       "engines": {
         "node": ">= 8"
@@ -9127,9 +9127,9 @@
       "dev": true
     },
     "@openpgp/web-stream-tools": {
-      "version": "0.1.2",
-      "resolved": "https://registry.npmjs.org/@openpgp/web-stream-tools/-/web-stream-tools-0.1.2.tgz",
-      "integrity": "sha512-uyTIFj6kjYMmeTv1bTIUcaTjC34ewpHny3XE+CvRCWGom642YCtIfd+6JFdemPgp18ZZc/u11D1SU16lpH3l0w==",
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/@openpgp/web-stream-tools/-/web-stream-tools-0.1.3.tgz",
+      "integrity": "sha512-mT/ds43cH6c+AO5RFpxs+LkACr7KjC3/dZWHrP6KPrWJu4uJ/XJ+p7telaoYiqUfdjiiIvdNSOfhezW9fkmboQ==",
       "dev": true,
       "requires": {}
     },
@@ -14496,9 +14496,9 @@
       }
     },
     "typescript": {
-      "version": "5.4.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.4.5.tgz",
-      "integrity": "sha512-vcI4UpRgg81oIRUFwR0WSIHKt11nJ7SAVlYNIu+QpqeyXP+gpQJy/Z4+F0aGxSE4MqwjyXvW/TzgkLAx2AGHwQ==",
+      "version": "5.5.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.5.2.tgz",
+      "integrity": "sha512-NcRtPEOsPFFWjobJEtfihkLCZCXZt/os3zf8nTxjVH3RvTSxjrCamJpbExGvYOF+tFHc3pA65qpdwPbzjohhew==",
       "dev": true
     },
     "ua-parser-js": {
@@ -14625,9 +14625,9 @@
       "dev": true
     },
     "web-streams-polyfill": {
-      "version": "3.3.3",
-      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-3.3.3.tgz",
-      "integrity": "sha512-d2JWLCivmZYTSIoge9MsgFCZrt571BikcWGYkjC1khllbTeDlGqZ2D8vD8E/lJa8WGWbb7Plm8/XJYV7IJHZZw==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-4.0.0.tgz",
+      "integrity": "sha512-0zJXHRAYEjM2tUfZ2DiSOHAa2aw1tisnnhU3ufD57R8iefL+DcdJyRBRyJpG+NUimDgbTI/lH+gAE1PAvV3Cgw==",
       "dev": true
     },
     "whatwg-encoding": {
diff --git a/package.json b/package.json
index f884af52..6a06fd28 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "license": "LGPL-3.0+",
   "homepage": "https://openpgpjs.org/",
   "engines": {
-    "node": ">= 16.5.0"
+    "node": ">= 18.0.0"
   },
   "keywords": [
     "crypto",
@@ -68,7 +68,7 @@
     "@openpgp/jsdoc": "^3.6.11",
     "@openpgp/seek-bzip": "^1.0.5-git",
     "@openpgp/tweetnacl": "^1.0.4-1",
-    "@openpgp/web-stream-tools": "~0.1.2",
+    "@openpgp/web-stream-tools": "~0.1.3",
     "@rollup/plugin-alias": "^5.1.0",
     "@rollup/plugin-commonjs": "^25.0.7",
     "@rollup/plugin-node-resolve": "^15.2.3",
@@ -109,8 +109,8 @@
     "ts-node": "^10.9.2",
     "tslib": "^2.6.2",
     "tsx": "^4.10.4",
-    "typescript": "^5.4.5",
-    "web-streams-polyfill": "^3.3.3"
+    "typescript": "^5.5.2",
+    "web-streams-polyfill": "^4.0.0"
   },
   "repository": {
     "type": "git",
diff --git a/rollup.config.js b/rollup.config.js
index 87050ee8..ca145fc9 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -89,7 +89,7 @@ export default Object.assign([
     ].map(options => ({ ...options, inlineDynamicImports: true })),
     plugins: [
       resolve({
-        exportConditions: ['node'] // needed for resolution of noble-curves import of '@noble/crypto' in Node 16 and 18
+        exportConditions: ['node'] // needed for resolution of noble-curves import of '@noble/crypto' in Node 18
       }),
       typescript({
         compilerOptions: { outDir: './dist/tmp-ts' }