diff --git a/package.json b/package.json
index 7a6fb9f7..e8ea64a1 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "fast-text-encoding": "^1.0.0",
     "gaxios": "^2.0.0",
     "gcp-metadata": "^2.0.0",
-    "gtoken": "^3.0.0",
+    "gtoken": "^4.0.0",
     "jws": "^3.1.5",
     "lru-cache": "^5.0.0"
   },
diff --git a/src/auth/jwtclient.ts b/src/auth/jwtclient.ts
index 92554879..54074cc5 100644
--- a/src/auth/jwtclient.ts
+++ b/src/auth/jwtclient.ts
@@ -211,11 +211,10 @@ export class JWT extends OAuth2Client {
     const gtoken = this.createGToken();
     const token = await gtoken.getToken();
     const tokens = {
-      access_token: token,
+      access_token: token.access_token,
       token_type: 'Bearer',
       expiry_date: gtoken.expiresAt,
-      // tslint:disable-next-line no-any
-      id_token: (gtoken.rawToken! as any).id_token,
+      id_token: gtoken.idToken,
     };
     this.emit('tokens', tokens);
     return {res: null, tokens};