diff --git a/pipenv/cli.py b/pipenv/cli.py
index 2ba4a821..bae8b6e8 100644
--- a/pipenv/cli.py
+++ b/pipenv/cli.py
@@ -917,7 +917,7 @@ def install(package_name=False, more_packages=False, dev=False, three=False, pyt
 @click.option('--three/--two', is_flag=True, default=None, help="Use Python 3/2 when creating virtualenv.")
 @click.option('--python', default=False, nargs=1, help="Specify which version of Python virtualenv should use.")
 @click.option('--system', is_flag=True, default=False, help="System pip management.")
-@click.option('--lock', is_flag=True, default=False, help="Lock afterwards.")
+@click.option('--lock', is_flag=True, default=True, help="Lock afterwards.")
 @click.option('--hashes', is_flag=True, default=False, help="Generate hashes, if locking.")
 @click.option('--dev', '-d', is_flag=True, default=False, help="Un-install all package from [dev-packages].")
 @click.option('--all', is_flag=True, default=False, help="Purge all package(s) from virtualenv. Does not edit Pipfile.")