diff --git a/a3p-integration/proposals/a:upgrade-14/post.test.js b/a3p-integration/proposals/a:upgrade-14/post.test.js
index e26fb1e280b..acb82d0ac4f 100644
--- a/a3p-integration/proposals/a:upgrade-14/post.test.js
+++ b/a3p-integration/proposals/a:upgrade-14/post.test.js
@@ -6,3 +6,9 @@ test(`Smart Wallet vat was upgraded`, async t => {
 
   t.is(incarnation, 2);
 });
+
+test(`Zoe vat was upgraded`, async t => {
+  const incarnation = await getIncarnation('zoe');
+
+  t.is(incarnation, 1);
+});
diff --git a/a3p-integration/proposals/a:upgrade-14/sanity.test.js b/a3p-integration/proposals/a:upgrade-14/sanity.test.js
deleted file mode 100644
index 96f0b86f8b5..00000000000
--- a/a3p-integration/proposals/a:upgrade-14/sanity.test.js
+++ /dev/null
@@ -1,14 +0,0 @@
-/**
- * @file Sanity checks of upgrade-14
- *
- * This "upgrade-14" test is a dummy since there is no upgrade behavior to be tested.
- * This file serves as a starting point for tests of upgrade-14.
- */
-import test from 'ava';
-
-import { getIncarnation } from '@agoric/synthetic-chain/src/lib/vat-status.js';
-
-test(`Ensure Zoe Vat is at 0`, async t => {
-  const incarnation = await getIncarnation('zoe');
-  t.is(incarnation, 0);
-});
diff --git a/golang/cosmos/app/app.go b/golang/cosmos/app/app.go
index 2c391de5f61..98268fc03fd 100644
--- a/golang/cosmos/app/app.go
+++ b/golang/cosmos/app/app.go
@@ -834,6 +834,8 @@ func upgrade14Handler(app *GaiaApp, targetUpgrade string) func(sdk.Context, upgr
 		CoreProposalSteps := []vm.CoreProposalStep{
 			// First, upgrade wallet factory
 			vm.CoreProposalStepForModules("@agoric/vats/scripts/build-wallet-factory2-upgrade.js"),
+			// Then, upgrade Zoe and ZCF
+			vm.CoreProposalStepForModules("@agoric/vats/scripts/replace-zoe.js"),
 		}
 
 		app.upgradeDetails = &upgradeDetails{
diff --git a/packages/vats/scripts/replace-zoe.js b/packages/vats/scripts/replace-zoe.js
new file mode 100644
index 00000000000..8f559a6ee62
--- /dev/null
+++ b/packages/vats/scripts/replace-zoe.js
@@ -0,0 +1,19 @@
+import { makeHelpers } from '@agoric/deploy-script-support';
+
+/** @type {import('@agoric/deploy-script-support/src/externalTypes.js').ProposalBuilder} */
+export const defaultProposalBuilder = async ({ publishRef, install }) =>
+  harden({
+    sourceSpec: '@agoric/vats/src/proposals/zcf-proposal.js',
+    getManifestCall: [
+      'getManifestForZoe',
+      {
+        zoeRef: publishRef(install('@agoric/vats/src/vat-zoe.js')),
+        zcfRef: publishRef(install('@agoric/zoe/src/contractFacet/vatRoot.js')),
+      },
+    ],
+  });
+
+export default async (homeP, endowments) => {
+  const { writeCoreProposal } = await makeHelpers(homeP, endowments);
+  await writeCoreProposal('replace-zcf', defaultProposalBuilder);
+};
diff --git a/packages/vats/src/proposals/zcf-proposal.js b/packages/vats/src/proposals/zcf-proposal.js
new file mode 100644
index 00000000000..7d974e02460
--- /dev/null
+++ b/packages/vats/src/proposals/zcf-proposal.js
@@ -0,0 +1,49 @@
+import { E } from '@endo/far';
+
+/**
+ * @param {BootstrapPowers & {
+ *   consume: {
+ *     vatAdminSvc: VatAdminSvc;
+ *     vatStore: MapStore<
+ *       string,
+ *       import('@agoric/swingset-vat').CreateVatResults
+ *     >;
+ *   };
+ * }} powers
+ * @param {object} options
+ * @param {{ zoeRef: VatSourceRef; zcfRef: VatSourceRef }} options.options
+ */
+export const upgradeZcf = async (
+  { consume: { vatAdminSvc, vatStore } },
+  options,
+) => {
+  const { zoeRef, zcfRef } = options.options;
+
+  assert(zoeRef.bundleID);
+  const zoeBundleCap = await E(vatAdminSvc).getBundleCap(zoeRef.bundleID);
+  console.log(`ZOE BUNDLE ID: `, zoeRef.bundleID);
+
+  const { adminNode, root: zoeRoot } = await E(vatStore).get('zoe');
+
+  await E(adminNode).upgrade(zoeBundleCap, {});
+
+  const zoeConfigFacet = await E(zoeRoot).getZoeConfigFacet();
+  await E(zoeConfigFacet).updateZcfBundleId(zcfRef.bundleID);
+  console.log(`ZCF BUNDLE ID: `, zcfRef.bundleID);
+};
+
+export const getManifestForZoe = (_powers, { zoeRef, zcfRef }) => ({
+  manifest: {
+    [upgradeZcf.name]: {
+      consume: {
+        vatAdminSvc: 'vatAdminSvc',
+        vatStore: 'vatStore',
+      },
+      produce: {},
+    },
+  },
+  options: {
+    zoeRef,
+    zcfRef,
+  },
+});