diff --git a/packages/vertexai/__tests__/api.test.ts b/packages/vertexai/__tests__/api.test.ts
index d38b0306c2..6b5d59e185 100644
--- a/packages/vertexai/__tests__/api.test.ts
+++ b/packages/vertexai/__tests__/api.test.ts
@@ -44,7 +44,7 @@ describe('Top level API', () => {
     const app = firebase.app();
     const auth = app.auth();
     const appCheck = app.appCheck();
-    // proves our limited internal auth and app check types are correct and allow them to be passed in
+
     getVertexAI(app, undefined, appCheck, auth);
   });
 
diff --git a/packages/vertexai/lib/index.ts b/packages/vertexai/lib/index.ts
index 3898e004e0..53e8f849ed 100644
--- a/packages/vertexai/lib/index.ts
+++ b/packages/vertexai/lib/index.ts
@@ -17,7 +17,6 @@
 
 import './polyfills';
 import { getApp, ReactNativeFirebase } from '@react-native-firebase/app';
-import { InternalAppCheck, InternalAuth } from './types/internal';
 import { ModelParams, RequestOptions, VertexAIErrorCode } from './types';
 import { DEFAULT_LOCATION } from './constants';
 import { VertexAI, VertexAIOptions } from './public-types';
@@ -26,15 +25,13 @@ import { GenerativeModel } from './models/generative-model';
 import { VertexAIService } from './service';
 export { ChatSession } from './methods/chat-session';
 export * from './requests/schema-builder';
+import { FirebaseAuthTypes } from '@react-native-firebase/auth';
+import { FirebaseAppCheckTypes } from '@react-native-firebase/app-check';
 
 export { GenerativeModel };
 
 export { VertexAIError };
 
-// We don't have access to RNFB auth and appCheck so we use only types for what we need (i.e get tokens)
-type AppCheck = InternalAppCheck;
-type Auth = InternalAuth;
-
 /**
  * Returns a <code>{@link VertexAI}</code> instance for the given app.
  *
@@ -48,8 +45,8 @@ type Auth = InternalAuth;
 export function getVertexAI(
   app: ReactNativeFirebase.FirebaseApp = getApp(),
   options?: VertexAIOptions,
-  appCheck?: AppCheck,
-  auth?: Auth,
+  appCheck?: FirebaseAppCheckTypes.Module,
+  auth?: FirebaseAuthTypes.Module,
 ): VertexAI {
   return {
     app,
diff --git a/packages/vertexai/lib/service.ts b/packages/vertexai/lib/service.ts
index 4f184a94ae..b8ba390472 100644
--- a/packages/vertexai/lib/service.ts
+++ b/packages/vertexai/lib/service.ts
@@ -18,17 +18,18 @@
 import { ReactNativeFirebase } from '@react-native-firebase/app';
 import { VertexAI, VertexAIOptions } from './public-types';
 import { DEFAULT_LOCATION } from './constants';
-import { InternalAppCheck, InternalAuth } from './types/internal';
+import { FirebaseAuthTypes } from '@react-native-firebase/auth';
+import { FirebaseAppCheckTypes } from '@react-native-firebase/app-check';
 
 export class VertexAIService implements VertexAI {
-  auth: InternalAuth | null;
-  appCheck: InternalAppCheck | null;
+  auth: FirebaseAuthTypes.Module | null;
+  appCheck: FirebaseAppCheckTypes.Module | null;
   location: string;
 
   constructor(
     public app: ReactNativeFirebase.FirebaseApp,
-    auth?: InternalAuth,
-    appCheck?: InternalAppCheck,
+    auth?: FirebaseAuthTypes.Module,
+    appCheck?: FirebaseAppCheckTypes.Module,
     public options?: VertexAIOptions,
   ) {
     this.auth = auth || null;
diff --git a/packages/vertexai/lib/types/internal.ts b/packages/vertexai/lib/types/internal.ts
index 5b48331d19..0dbf88efb1 100644
--- a/packages/vertexai/lib/types/internal.ts
+++ b/packages/vertexai/lib/types/internal.ts
@@ -14,62 +14,12 @@
  * limitations under the License.
  *
  */
+import { FirebaseAppCheckTypes } from '@react-native-firebase/app-check';
 
 export interface ApiSettings {
   apiKey: string;
   project: string;
   location: string;
   getAuthToken?: () => Promise<string>;
-  getAppCheckToken?: () => Promise<AppCheckTokenResult>;
-}
-
-export interface InternalAppCheck {
-  /**
-   * Requests Firebase App Check token.
-   * This method should only be used if you need to authorize requests to a non-Firebase backend.
-   * Requests to Firebase backend are authorized automatically if configured.
-   *
-   * @param forceRefresh - If true, a new Firebase App Check token is requested and the token cache is ignored.
-   * If false, the cached token is used if it exists and has not expired yet.
-   * In most cases, false should be used. True should only be used if the server explicitly returns an error, indicating a revoked token.
-   */
-  getToken(forceRefresh?: boolean): Promise<AppCheckTokenResult>;
-}
-
-interface AppCheckTokenResult {
-  /**
-   * The token string in JWT format.
-   */
-  readonly token: string;
-}
-
-export interface InternalAuth {
-  /**
-   * Returns the currently signed-in user (or null if no user signed in). See the User interface documentation for detailed usage.
-   *
-   * #### Example
-   *
-   * ```js
-   * const user = firebase.auth().currentUser;
-   * ```
-   *
-   * > It is recommended to use {@link auth#onAuthStateChanged} to track whether the user is currently signed in.
-   */
-  currentUser: User | null;
-}
-
-export interface User {
-  /**
-   * Returns the users authentication token.
-   *
-   * #### Example
-   *
-   * ```js
-   * // Force a token refresh
-   * const idToken = await firebase.auth().currentUser.getIdToken(true);
-   * ```
-   *
-   * @param forceRefresh A boolean value which forces Firebase to refresh the token.
-   */
-  getIdToken(forceRefresh?: boolean): Promise<string>;
+  getAppCheckToken?: () => Promise<FirebaseAppCheckTypes.AppCheckTokenResult>;
 }
diff --git a/packages/vertexai/tsconfig.json b/packages/vertexai/tsconfig.json
index 3a420fc518..f1d9865812 100644
--- a/packages/vertexai/tsconfig.json
+++ b/packages/vertexai/tsconfig.json
@@ -24,7 +24,9 @@
     "strict": true,
     "baseUrl": ".",
     "paths": {
-      "@react-native-firebase/app": ["../app/lib"]
+      "@react-native-firebase/app": ["../app/lib"],
+      "@react-native-firebase/auth": ["../auth/lib"],
+      "@react-native-firebase/app-check": ["../app-check/lib"],
     }
   }
 }
diff --git a/tsconfig-jest.json b/tsconfig-jest.json
index 14fb61e3a3..0149111b06 100644
--- a/tsconfig-jest.json
+++ b/tsconfig-jest.json
@@ -3,7 +3,9 @@
   "compilerOptions": {
     "baseUrl": ".",
     "paths": {
-      "@react-native-firebase/app": ["packages/app/lib"]
+      "@react-native-firebase/app": ["packages/app/lib"],
+      "@react-native-firebase/auth": ["packages/auth/lib"],
+      "@react-native-firebase/app-check": ["packages/app-check/lib"],
     }
   }
 }