diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a148a556..d3af7cb7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -44,6 +44,11 @@ jobs:
         run: |
           echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" >> ~/.npmrc
 
+      - name: Dependency licence guard
+        # Invoked directly rather than through pnpm: it is lockfile-only and needs
+        # no node_modules, so this fails fast before the install.
+        run: node scripts/check-dependency-licenses.cjs
+
       - name: Install dependencies
         run: pnpm install
 
diff --git a/apps/builder/src/export/__tests__/__snapshots__/ExportSnapshotTests.test.ts.snap b/apps/builder/src/export/__tests__/__snapshots__/ExportSnapshotTests.test.ts.snap
index f995ad67..905219ca 100644
--- a/apps/builder/src/export/__tests__/__snapshots__/ExportSnapshotTests.test.ts.snap
+++ b/apps/builder/src/export/__tests__/__snapshots__/ExportSnapshotTests.test.ts.snap
@@ -341,7 +341,7 @@ export default function GeneratedForm({ adapter, isWalletConnected }: GeneratedF
 exports[`Export Snapshot Tests > evm Export Snapshots > should match snapshot for package.json structure > package-json-evm 1`] = `
 {
   "dependencies": {
-    "@openzeppelin/adapter-evm": "^3.0.0",
+    "@openzeppelin/adapter-evm": "^4.0.0",
     "@openzeppelin/ui-components": "^3.8.2",
     "@openzeppelin/ui-react": "^3.3.1",
     "@openzeppelin/ui-renderer": "^3.4.1",
diff --git a/apps/builder/src/export/versions.ts b/apps/builder/src/export/versions.ts
index 12558e93..10719c36 100644
--- a/apps/builder/src/export/versions.ts
+++ b/apps/builder/src/export/versions.ts
@@ -6,11 +6,11 @@
  */
 
 export const packageVersions = {
-  '@openzeppelin/adapter-evm': '3.0.0',
-  '@openzeppelin/adapter-midnight': '2.2.0',
+  '@openzeppelin/adapter-evm': '4.0.0',
+  '@openzeppelin/adapter-midnight': '4.0.0',
   '@openzeppelin/adapter-polkadot': '3.0.0',
-  '@openzeppelin/adapter-solana': '2.2.0',
-  '@openzeppelin/adapter-stellar': '3.0.0',
+  '@openzeppelin/adapter-solana': '4.0.0',
+  '@openzeppelin/adapter-stellar': '4.0.0',
   '@openzeppelin/ui-react': '3.3.1',
   '@openzeppelin/ui-renderer': '3.4.1',
   '@openzeppelin/ui-storage': '1.2.4',
diff --git a/package.json b/package.json
index cb5cc581..7882f1e9 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,8 @@
     "outdated": "pnpm outdated -r",
     "export-app": "node apps/builder/src/export/cli/export-app.cjs",
     "preinstall": "npx only-allow pnpm",
-    "install-pnpm": "npm install -g pnpm"
+    "install-pnpm": "npm install -g pnpm",
+    "check-licenses": "node scripts/check-dependency-licenses.cjs"
   },
   "lint-staged": {
     "*.{js,jsx,ts,tsx,cjs,mjs}": "pnpm fix-all"
diff --git a/scripts/check-dependency-licenses.cjs b/scripts/check-dependency-licenses.cjs
new file mode 100644
index 00000000..c85212ed
--- /dev/null
+++ b/scripts/check-dependency-licenses.cjs
@@ -0,0 +1,121 @@
+#!/usr/bin/env node
+/**
+ * Fails if a dependency family we removed for licensing reasons reappears in the
+ * install tree.
+ *
+ * Two families were stripped, and both are easy to reintroduce by accident because
+ * neither is a direct dependency -- they arrive transitively and a grep of source
+ * code will not surface them:
+ *
+ * - `@trezor/*` is licensed under the Trezor Reference Source License, which grants
+ *   "reference use" within one company and excludes redistribution. It arrives via
+ *   `@creit.tech/stellar-wallets-kit`, which declares it as a hard dependency.
+ * - `@reown/*` moved to the Reown Community License at 1.8.3: commercial fees above
+ *   500 monthly active users, a clause requiring all use to connect to Reown's
+ *   gateway, and a confidentiality clause. It arrives via
+ *   `@walletconnect/ethereum-provider`, which `@wagmi/connectors` declares as a hard
+ *   dependency. `@walletconnect/*` itself is Apache-2.0, but it is the only route
+ *   Reown takes into the tree, so it is banned too.
+ *
+ * Both are removed by `readPackage` hooks in `.pnpmfile.cjs`. This guard checks the
+ * outcome (nothing in the lockfile) *and* the mechanism (the hooks are still
+ * wired), so deleting a hook fails loudly even if the committed lockfile happens to
+ * be clean.
+ *
+ * Deliberately dependency-free and lockfile-only: it runs before `pnpm install` and
+ * needs no network.
+ */
+
+const fs = require('node:fs');
+const path = require('node:path');
+
+const BANNED_SCOPES = [
+  {
+    scope: '@trezor/',
+    licence: 'Trezor Reference Source License (no redistribution)',
+    arrivesVia: '@creit.tech/stellar-wallets-kit',
+  },
+  {
+    scope: '@reown/',
+    licence: 'Reown Community License (fees above 500 MAU)',
+    arrivesVia: '@walletconnect/ethereum-provider',
+  },
+  {
+    scope: '@walletconnect/',
+    licence: 'Apache-2.0 itself, but the only route @reown/* takes into the tree',
+    arrivesVia: '@wagmi/connectors',
+  },
+];
+
+const REQUIRED_HOOKS = ['stripTrezorDependencies', 'stripWalletConnectDependencies'];
+
+const repoRoot = path.resolve(__dirname, '..');
+const lockfilePath = path.join(repoRoot, 'pnpm-lock.yaml');
+const pnpmfilePath = path.join(repoRoot, '.pnpmfile.cjs');
+
+const problems = [];
+
+// 1. The outcome: nothing from a banned family may appear in the lockfile.
+if (!fs.existsSync(lockfilePath)) {
+  problems.push(`Missing ${path.relative(repoRoot, lockfilePath)} -- cannot verify dependencies.`);
+} else {
+  const lines = fs.readFileSync(lockfilePath, 'utf8').split('\n');
+
+  for (const { scope, licence, arrivesVia } of BANNED_SCOPES) {
+    const hits = [];
+    lines.forEach((line, index) => {
+      if (line.includes(scope)) {
+        hits.push({ line: index + 1, text: line.trim() });
+      }
+    });
+
+    if (hits.length > 0) {
+      problems.push(
+        `${hits.length} lockfile reference(s) to ${scope}*\n` +
+          `    licence: ${licence}\n` +
+          `    usually arrives via: ${arrivesVia}\n` +
+          hits
+            .slice(0, 5)
+            .map((hit) => `    pnpm-lock.yaml:${hit.line}: ${hit.text.slice(0, 100)}`)
+            .join('\n') +
+          (hits.length > 5 ? `\n    ... and ${hits.length - 5} more` : '')
+      );
+    }
+  }
+}
+
+// 2. The mechanism: the strip hooks must still be wired into readPackage.
+if (!fs.existsSync(pnpmfilePath)) {
+  problems.push(`Missing ${path.relative(repoRoot, pnpmfilePath)} -- the strip hooks live there.`);
+} else {
+  const pnpmfile = fs.readFileSync(pnpmfilePath, 'utf8');
+  for (const hook of REQUIRED_HOOKS) {
+    // Defined and actually called, not just present as a dead function.
+    // The call must be a statement, so anchor to line start -- otherwise the
+    // function declaration itself satisfies the "is it called" test.
+    const defined = pnpmfile.includes(`function ${hook}(`);
+    const called = new RegExp(`^\\s+${hook}\\(pkg`, 'm').test(pnpmfile);
+    if (!defined || !called) {
+      problems.push(
+        `.pnpmfile.cjs no longer ${defined ? 'calls' : 'defines'} ${hook}().\n` +
+          '    Without it the banned packages return to the install tree on the next resolution.'
+      );
+    }
+  }
+}
+
+if (problems.length > 0) {
+  console.error('\n✖ Dependency licence check failed\n');
+  for (const problem of problems) {
+    console.error(`  - ${problem}\n`);
+  }
+  console.error(
+    'These families were removed deliberately. If a change legitimately needs one of\n' +
+      'them, that is a licensing decision -- raise it rather than relaxing this check.\n' +
+      'To restore the intended state: keep the .pnpmfile.cjs hooks, delete\n' +
+      'node_modules/.pnpm-workspace-state-v1.json, then re-run pnpm install.\n'
+  );
+  process.exit(1);
+}
+
+console.log('✓ Dependency licence check passed (no @trezor/*, @reown/* or @walletconnect/*)');