diff --git a/HISTORY.txt b/HISTORY.txt
index 999e19a3..54ba04f9 100644
--- a/HISTORY.txt
+++ b/HISTORY.txt
@@ -1,3 +1,5 @@
+5.3.5:
+ - Removal of install --lock option.
 5.3.4:
  - Fix pip index passing.
 5.3.3:
diff --git a/pipenv/cli.py b/pipenv/cli.py
index 1a7366f6..916ed4bb 100644
--- a/pipenv/cli.py
+++ b/pipenv/cli.py
@@ -870,11 +870,10 @@ def cli(ctx, where=False, venv=False, rm=False, bare=False, three=False, python=
 @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=True, help="Lock afterwards.")
 @click.option('--hashes', is_flag=True, default=PIPENV_USE_HASHES, help="Use hashes.")
 @click.option('--ignore-pipfile', is_flag=True, default=False, help="Ignore Pipfile when installing, using the Pipfile.lock.")
 @click.option('--skip-lock', is_flag=True, default=False, help="Ignore locking mechanisms when installing—use the Pipfile, instead.")
-def install(package_name=False, more_packages=False, dev=False, three=False, python=False, system=False, lock=False, hashes=True, ignore_pipfile=False, skip_lock=False):
+def install(package_name=False, more_packages=False, dev=False, three=False, python=False, system=False, lock=True, hashes=True, ignore_pipfile=False, skip_lock=False):
 
     # Automatically use an activated virtualenv.
     if PIPENV_USE_SYSTEM: