diff --git a/src/NativeReactNativeBiometrics.ts b/src/NativeReactNativeBiometrics.ts
index 02e63af..80f6178 100644
--- a/src/NativeReactNativeBiometrics.ts
+++ b/src/NativeReactNativeBiometrics.ts
@@ -20,7 +20,7 @@ export interface Spec extends TurboModule {
     available: boolean;
     biometryType?: 'Biometrics' | 'FaceID' | 'TouchID' | 'None' | 'Unknown';
     error?: string;
-    isDeviceSecure?: boolean;
+    isDeviceSecure: boolean;
   }>;
   simplePrompt(
     promptMessage: string,
diff --git a/src/index.tsx b/src/index.tsx
index a8ef764..1a8d4e9 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -668,7 +668,7 @@ export type BiometricSensorInfo = {
   errorCode?: string;
   fallbackUsed?: boolean;
   biometricStrength?: BiometricStrength;
-  isDeviceSecure?: boolean;
+  isDeviceSecure: boolean;
 };
 
 export type BiometricAuthOptions = {