diff --git a/endpoints/bookstore-grpc/jwt_token_gen.py b/endpoints/bookstore-grpc/jwt_token_gen.py
index 5138fc8100e..8bf5ef1fa57 100644
--- a/endpoints/bookstore-grpc/jwt_token_gen.py
+++ b/endpoints/bookstore-grpc/jwt_token_gen.py
@@ -68,4 +68,4 @@ def generate_jwt(service_account_file, issuer, audiences):
     args = parser.parse_args()
 
     signed_jwt = generate_jwt(args.file, args.issuer, args.audiences)
-    print(signed_jwt)
+    print(signed_jwt.decode('utf-8'))