diff --git a/package.json b/package.json
index 29d0301..d4b7ea2 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,8 @@
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-screen-wake-lock": "^3.0.2",
-    "styled-components": "^6.0.7"
+    "styled-components": "^6.0.7",
+    "zod": "^3.22.4"
   },
   "devDependencies": {
     "@emotion/react": "^11.11.1",
diff --git a/src/Providers/GlobalSettingsProvider.tsx b/src/Providers/GlobalSettingsProvider.tsx
index b17ed6e..eaace51 100644
--- a/src/Providers/GlobalSettingsProvider.tsx
+++ b/src/Providers/GlobalSettingsProvider.tsx
@@ -5,7 +5,13 @@ import {
   GlobalSettingsContextType,
 } from '../Contexts/GlobalSettingsContext';
 import { useAnalytics } from '../Hooks/useAnalytics';
-import { InitialGameSettings, Orientation, Settings } from '../Types/Settings';
+import {
+  GameFormat,
+  InitialGameSettings,
+  InitialGameSettingsSchema,
+  Orientation,
+  Settings,
+} from '../Types/Settings';
 
 export const GlobalSettingsProvider = ({
   children,
@@ -33,7 +39,7 @@ export const GlobalSettingsProvider = ({
       startingLifeTotal: 40,
       useCommanderDamage: true,
       orientation: Orientation.Landscape,
-      gameFormat: 'commander',
+      gameFormat: GameFormat.Commander,
     };
     setInitialSettings({ ...defaultSettings, ...initialGameSettings });
   };
@@ -45,9 +51,18 @@ export const GlobalSettingsProvider = ({
   );
 
   useEffect(() => {
+    //parse existing game settings with zod schema
+    const parsedInitialGameSettings =
+      InitialGameSettingsSchema.safeParse(initialGameSettings);
+
+    if (!parsedInitialGameSettings.success) {
+      localStorage.setItem('initialGameSettings', '');
+      return;
+    }
+
     localStorage.setItem(
       'initialGameSettings',
-      JSON.stringify(initialGameSettings)
+      JSON.stringify(parsedInitialGameSettings.data)
     );
   }, [initialGameSettings]);
 
diff --git a/src/Types/Settings.ts b/src/Types/Settings.ts
index cc1c8e5..8e5499b 100644
--- a/src/Types/Settings.ts
+++ b/src/Types/Settings.ts
@@ -1,9 +1,17 @@
+import { z } from 'zod';
+
 export enum Orientation {
   OppositeLandscape = 'opposite-landscape',
   Landscape = 'landscape',
   Portrait = 'portrait',
 }
 
+export enum GameFormat {
+  Commander = 'commander',
+  Standard = 'standard',
+  TwoHeadedGiant = 'two-headed-giant',
+}
+
 export type Settings = {
   keepAwake: boolean;
   showStartingPlayer: boolean;
@@ -18,4 +26,10 @@ export type InitialGameSettings = {
   orientation: Orientation;
 };
 
-type GameFormat = 'commander' | 'standard' | 'two-headed-giant';
+export const InitialGameSettingsSchema = z.object({
+  startingLifeTotal: z.number().min(1).max(200).default(20),
+  useCommanderDamage: z.boolean().default(false),
+  gameFormat: z.nativeEnum(GameFormat).optional(),
+  numberOfPlayers: z.number().min(1).max(6).default(2),
+  orientation: z.nativeEnum(Orientation).default(Orientation.Landscape),
+});
diff --git a/yarn.lock b/yarn.lock
index f58e4cb..afa13a4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6988,3 +6988,8 @@ zip-stream@^4.1.0:
     archiver-utils "^3.0.4"
     compress-commons "^4.1.2"
     readable-stream "^3.6.0"
+
+zod@^3.22.4:
+  version "3.22.4"
+  resolved "https://registry.yarnpkg.com/zod/-/zod-3.22.4.tgz#f31c3a9386f61b1f228af56faa9255e845cf3fff"
+  integrity sha512-iC+8Io04lddc+mVqQ9AZ7OQ2MrUKGN+oIQyq1vemgt46jwCwLfhq7/pwnBnNXXXZb8VTVLKwp9EDkx+ryxIWmg==