diff --git a/src/lib/store/__snapshots__/ship.test.ts.snap b/src/lib/store/__snapshots__/ship.test.ts.snap
new file mode 100644
index 0000000..6be9769
--- /dev/null
+++ b/src/lib/store/__snapshots__/ship.test.ts.snap
@@ -0,0 +1,99 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`state has the expected shape 1`] = `
+{
+  "carrier": {
+    "nbrBays": 0,
+    "reqs": {
+      "cost": 0,
+      "mass": 0,
+    },
+    "squadrons": [],
+  },
+  "identification": {
+    "isCarrier": false,
+    "reqs": {
+      "cost": 0,
+      "mass": 10,
+      "usedMass": 0,
+    },
+    "shipClass": "",
+    "shipType": "",
+  },
+  "propulsion": {
+    "drive": {
+      "advanced": false,
+      "rating": 0,
+      "reqs": {
+        "cost": 0,
+        "mass": 0,
+      },
+    },
+    "ftl": {
+      "reqs": {
+        "cost": 0,
+        "mass": 0,
+      },
+      "type": "none",
+    },
+  },
+  "schemaVersion": "1",
+  "structure": {
+    "armor": {
+      "layers": [],
+      "reqs": {
+        "cost": 0,
+        "mass": 0,
+      },
+    },
+    "cargo": {
+      "reqs": {
+        "cost": 0,
+        "mass": 0,
+      },
+      "space": 0,
+    },
+    "hull": {
+      "max": 0,
+      "min": 0,
+      "rating": 0,
+      "reqs": {
+        "cost": 0,
+        "mass": 0,
+      },
+    },
+    "screens": {
+      "advanced": 0,
+      "reqs": {
+        "cost": 0,
+        "mass": 0,
+      },
+      "standard": 0,
+    },
+    "streamlining": {
+      "reqs": {
+        "cost": 0,
+        "mass": 0,
+      },
+      "type": "none",
+    },
+  },
+  "weaponry": {
+    "adfc": {
+      "rating": 0,
+      "reqs": {
+        "cost": 0,
+        "mass": 0,
+      },
+    },
+    "firecons": {
+      "reqs": {
+        "cost": 0,
+        "mass": 0,
+      },
+      "stations": 0,
+    },
+    "weapons": [],
+  },
+}
+`;
diff --git a/src/lib/store/ship.test.ts b/src/lib/store/ship.test.ts
index 53af059..56a1724 100644
--- a/src/lib/store/ship.test.ts
+++ b/src/lib/store/ship.test.ts
@@ -2,60 +2,68 @@ import { test, expect } from "vitest";
 import ship from "./ship";
 
 test("kicking the tires", () => {
-    const store = ship.createStore();
-    store.dispatch.setFtlType("standard");
+  const store = ship.createStore();
+  store.dispatch.setFtlType("standard");
 
-    expect(store.getState().propulsion.ftl.reqs.mass).toEqual(1);
-    expect(store.getState().identification.reqs.usedMass).toEqual(1);
+  expect(store.getState().propulsion.ftl.reqs.mass).toEqual(1);
+  expect(store.getState().identification.reqs.usedMass).toEqual(1);
 
-    store.dispatch.setDrive({ rating: 3, advanced: true });
+  store.dispatch.setDrive({ rating: 3, advanced: true });
 
-    expect(store.getState().propulsion.drive.reqs).toEqual({ mass: 2, cost: 6 });
+  expect(store.getState().propulsion.drive.reqs).toEqual({ mass: 2, cost: 6 });
 
-    store.dispatch.setNbrCarrierBays(1);
-    expect(store.getState().carrier.nbrBays).toEqual(1);
-    store.dispatch.setNbrCarrierBays(2);
-    expect(store.getState().carrier.nbrBays).toEqual(2);
+  store.dispatch.setNbrCarrierBays(1);
+  expect(store.getState().carrier.nbrBays).toEqual(1);
+  store.dispatch.setNbrCarrierBays(2);
+  expect(store.getState().carrier.nbrBays).toEqual(2);
 
-    store.dispatch.setSquadronType(2, "fast");
+  store.dispatch.setSquadronType(2, "fast");
 
-    expect(store.getState().carrier.squadrons[1]).toHaveProperty("type", "fast");
+  expect(store.getState().carrier.squadrons[1]).toHaveProperty("type", "fast");
 
-    expect(store.getState.isCarrier()).toBe(true);
+  expect(store.getState.isCarrier()).toBe(true);
 
-    store.dispatch.setStreamlining("partial");
+  store.dispatch.setStreamlining("partial");
 
-    expect(store.getState.getStreamlining()).toBe("partial");
-    expect(store.selectors.getStreamlining(store.getState())).toBe("partial");
+  expect(store.getState.getStreamlining()).toBe("partial");
+  expect(store.selectors.getStreamlining(store.getState())).toBe("partial");
 
-    store.dispatch.setCargo(3);
-    expect(store.getState().structure.cargo).toEqual({
-        space: 3,
-        reqs: {
-            mass: 3,
-            cost: 0,
-        },
-    });
+  store.dispatch.setCargo(3);
+  expect(store.getState().structure.cargo).toEqual({
+    space: 3,
+    reqs: {
+      mass: 3,
+      cost: 0,
+    },
+  });
 
-    store.dispatch.setNbrArmorLayers(1);
-    store.dispatch.setArmorRating(1, 3);
+  store.dispatch.setNbrArmorLayers(1);
+  store.dispatch.setArmorRating(1, 3);
 
-    expect(store.getState().structure.armor).toEqual({
-        layers: [3],
-        reqs: {
-            cost: 6,
-            mass: 6,
-        },
-    });
+  expect(store.getState().structure.armor).toEqual({
+    layers: [3],
+    reqs: {
+      cost: 6,
+      mass: 6,
+    },
+  });
 
-    store.dispatch.addWeapon("beam");
-    expect(store.getState().weaponry.weapons[0]).toEqual({
-        id: 1,
-        reqs: { cost: 3, mass: 1 },
-        specs: {
-            arcs: ["FS", "F", "FP", "AP", "A", "AS"],
-            type: "beam",
-            weaponClass: 1,
-        },
-    });
+  store.dispatch.addWeapon("beam");
+  expect(store.getState().weaponry.weapons[0]).toEqual({
+    id: 1,
+    reqs: { cost: 3, mass: 1 },
+    specs: {
+      arcs: ["FS", "F", "FP", "AP", "A", "AS"],
+      type: "beam",
+      weaponClass: 1,
+    },
+  });
+});
+
+test("state has a schema version", () => {
+  expect(ship.initialState).toHaveProperty("schemaVersion");
+});
+
+test("state has the expected shape", () => {
+  expect(ship.initialState).toMatchSnapshot();
 });
diff --git a/src/lib/store/ship.ts b/src/lib/store/ship.ts
index fca0fcc..b177bf8 100644
--- a/src/lib/store/ship.ts
+++ b/src/lib/store/ship.ts
@@ -51,6 +51,9 @@ const weaponry = new Updux({
 });
 
 const shipDux = new Updux({
+  initialState: {
+    schemaVersion: "1",
+  },
   subduxes: {
     identification,
     structure,