diff --git a/pipenv/cli.py b/pipenv/cli.py
index 4839411eec..91abc522f6 100644
--- a/pipenv/cli.py
+++ b/pipenv/cli.py
@@ -823,24 +823,6 @@ def update(
                 crayons.white('.', bold=True),
             )
         )
-        do_lock(
-            verbose=verbose, clear=clear, pre=pre, keep_outdated=keep_outdated, pypi_mirror=pypi_mirror
-        )
-        do_sync(
-            ctx=ctx,
-            install=install,
-            dev=dev,
-            three=three,
-            python=python,
-            bare=bare,
-            dont_upgrade=False,
-            user=False,
-            verbose=verbose,
-            clear=clear,
-            unused=False,
-            sequential=sequential,
-            pypi_mirror=pypi_mirror,
-        )
     else:
         for package in ([package] + list(more_packages) or []):
             if package not in project.all_packages:
@@ -853,28 +835,23 @@ def update(
                     err=True,
                 )
                 sys.exit(1)
-        ensure_lockfile(keep_outdated=project.lockfile_exists, pypi_mirror=pypi_mirror)
-        # Install the dependencies.
-        do_install(
-            package_name=package,
-            more_packages=more_packages,
-            dev=dev,
-            three=three,
-            python=python,
-            pypi_mirror=pypi_mirror,
-            system=system,
-            lock=True,
-            ignore_pipfile=False,
-            skip_lock=False,
-            verbose=verbose,
-            requirements=False,
-            sequential=sequential,
-            pre=pre,
-            code=False,
-            deploy=False,
-            keep_outdated=True,
-            selective_upgrade=True,
-        )
+    do_lock(
+        verbose=verbose, clear=clear, pre=pre, keep_outdated=keep_outdated, pypi_mirror=pypi_mirror
+    )
+    do_sync(
+        ctx=ctx,
+        dev=dev,
+        three=three,
+        python=python,
+        bare=bare,
+        dont_upgrade=False,
+        user=False,
+        verbose=verbose,
+        clear=clear,
+        unused=False,
+        sequential=sequential,
+        pypi_mirror=pypi_mirror,
+    )
 
 
 @command(
@@ -999,7 +976,6 @@ def sync(
 
     do_sync(
         ctx=ctx,
-        install=install,
         dev=dev,
         three=three,
         python=python,
diff --git a/pipenv/core.py b/pipenv/core.py
index 321ec5889a..be67c8f5e0 100644
--- a/pipenv/core.py
+++ b/pipenv/core.py
@@ -2535,11 +2535,9 @@ def traverse(obj):
 
 def do_sync(
     ctx,
-    install,
     dev=False,
     three=None,
     python=None,
-    dry_run=False,
     bare=False,
     dont_upgrade=False,
     user=False,
diff --git a/tests/integration/test_pipenv.py b/tests/integration/test_pipenv.py
index 3d8a197b5d..00f291e2e7 100644
--- a/tests/integration/test_pipenv.py
+++ b/tests/integration/test_pipenv.py
@@ -58,3 +58,24 @@ def test_deploy_works(PipenvInstance, pypi):
 
         c = p.pipenv('install --deploy')
         assert c.return_code > 0
+
+
+@pytest.mark.update
+@pytest.mark.lock
+def test_update_locks(PipenvInstance, pypi):
+
+    with PipenvInstance(pypi=pypi) as p:
+        c = p.pipenv('install requests==2.14.0')
+        assert c.return_code == 0
+        with open(p.pipfile_path, 'r') as fh:
+            pipfile_contents = fh.read()
+        pipfile_contents = pipfile_contents.replace('==2.14.0', '*')
+        with open(p.pipfile_path, 'w') as fh:
+            fh.write(pipfile_contents)
+        c = p.pipenv('update requests')
+        assert c.return_code == 0
+        assert p.lockfile['default']['requests']['version'] == '==2.18.4'
+        c = p.pipenv('run pip freeze')
+        assert c.return_code == 0
+        lines = c.out.splitlines()
+        assert 'requests==2.18.4' in [l.strip() for l in lines]