diff --git a/package-lock.json b/package-lock.json
index 8031a22..aba1f7b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "@commitlint/cli": "^21.2.2",
         "@commitlint/config-conventional": "^21.2.2",
         "@eslint/js": "^10.0.1",
-        "@norbix.ai/ts": "^4.31.0",
+        "@norbix.ai/ts": "^4.32.0",
         "@reduxjs/toolkit": "^2.12.0",
         "@semantic-release/commit-analyzer": "^13.0.1",
         "@semantic-release/github": "^12.0.9",
@@ -45,7 +45,7 @@
         "node": ">=18"
       },
       "peerDependencies": {
-        "@norbix.ai/ts": ">=4.31.0",
+        "@norbix.ai/ts": ">=4.32.0",
         "@reduxjs/toolkit": ">=2.0.0",
         "react": ">=18.0.0",
         "react-redux": ">=9.0.0"
@@ -1490,9 +1490,9 @@
       }
     },
     "node_modules/@norbix.ai/ts": {
-      "version": "4.31.0",
-      "resolved": "https://registry.npmjs.org/@norbix.ai/ts/-/ts-4.31.0.tgz",
-      "integrity": "sha512-0nCic6VbLdmCDeJGhEwJaSo1O6Sj+p4M9xtww7Nbo/F1HDnqE7uBVL21MRoNCvZNpEui1fqgf0+j0vBGwIUfuw==",
+      "version": "4.32.0",
+      "resolved": "https://registry.npmjs.org/@norbix.ai/ts/-/ts-4.32.0.tgz",
+      "integrity": "sha512-6IVA8btojZtRsyTGSP1j87CD1n+w2kdzhLc9l8IkvpPu5qQUl7VLNSltjcQfXCoG+xX/6AbH/qZDLvXhYDkMcA==",
       "dev": true,
       "license": "MIT",
       "engines": {
diff --git a/package.json b/package.json
index 1dff8d6..c97e751 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "prepublishOnly": "npm run build"
   },
   "peerDependencies": {
-    "@norbix.ai/ts": ">=4.31.0",
+    "@norbix.ai/ts": ">=4.32.0",
     "@reduxjs/toolkit": ">=2.0.0",
     "react": ">=18.0.0",
     "react-redux": ">=9.0.0"
@@ -68,7 +68,7 @@
     "@commitlint/cli": "^21.2.2",
     "@commitlint/config-conventional": "^21.2.2",
     "@eslint/js": "^10.0.1",
-    "@norbix.ai/ts": "^4.31.0",
+    "@norbix.ai/ts": "^4.32.0",
     "@reduxjs/toolkit": "^2.12.0",
     "@semantic-release/commit-analyzer": "^13.0.1",
     "@semantic-release/github": "^12.0.9",
diff --git a/tests/payments.test.ts b/tests/payments.test.ts
index 7cbe1de..23230c2 100644
--- a/tests/payments.test.ts
+++ b/tests/payments.test.ts
@@ -67,6 +67,28 @@ describe('hubPayments', () => {
     expect(endpoints.getPaymentsWebhookLog.providesTags).toEqual(['PaymentIntegrations']);
     expect(calls).toEqual([{ method: 'hub.getPaymentsWebhookLog', args }]);
   });
+
+  /**
+   * Montonio `isSandbox` is optional since core SDK 4.32.0: empty = true on the
+   * gateway (sandbox). The hook must hand the caller's integration over as is,
+   * never fill the switch in.
+   */
+  it('savePaymentsIntegration leaves an unset Montonio isSandbox out', async () => {
+    const { calls, client } = fakeNorbix();
+    const args = {
+      integration: {
+        provider: 'Montonio',
+        integrationName: 'montonio',
+        accessKey: 'ak',
+        secretKey: 'sk',
+      },
+    };
+
+    await endpoints.savePaymentsIntegration.query(args)(client);
+
+    expect(calls).toEqual([{ method: 'hub.savePaymentsIntegration', args }]);
+    expect('isSandbox' in (calls[0]!.args as typeof args).integration).toBe(false);
+  });
 });
 
 /**