diff --git a/Pipfile.lock b/Pipfile.lock
index 215e60e9..18983fea 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,168 +1,131 @@
 {
-    "default": {
-        "virtualenv": {
-            "version": "==15.1.0",
-            "hash": "sha256:39d88b533b422825d644087a21e78c45cf5af0ef7a99a1fc9fbb7b481e5c85b0"
-        },
-        "pew": {
-            "version": "==0.1.26",
-            "hash": "sha256:259ac7a4603fe41b1fa950f30b2e4ccf4a23f7c89be2c34e0a4cec176c3ec581"
-        },
-        "virtualenv-clone": {
-            "version": "==0.2.6",
-            "hash": "sha256:6b3be5cab59e455f08c9eda573d23006b7d6fb41fae974ddaa2b275c93cc4405"
-        },
-        "six": {
-            "version": "==1.10.0",
-            "hash": "sha256:0ff78c403d9bccf5a425a6d31a12aa6b47f1c21ca4dc2573a7e2f32a97335eb1"
-        },
-        "backports.shutil_get_terminal_size": {
-            "version": "==1.0.0",
-            "hash": "sha256:0975ba55054c15e346944b38956a4c9cbee9009391e41b86c68990effb8c1f64"
-        },
-        "pathlib": {
-            "version": "==1.0.1",
-            "hash": "sha256:6940718dfc3eff4258203ad5021090933e5c04707d5ca8cc9e73c94a7894ea9f"
-        },
-        "packaging": {
-            "version": "==16.8",
-            "hash": "sha256:99276dc6e3a7851f32027a68f1095cd3f77c148091b092ea867a351811cfe388"
-        },
-        "pythonz-bd": {
-            "version": "==1.11.4",
-            "hash": "sha256:30fa48c5b542e1ebfca167f10699b149768dd18a90185d98b8a766636b6343b9"
-        },
-        "shutilwhich": {
-            "version": "==1.1.0",
-            "hash": "sha256:db1f39c6461e42f630fa617bb8c79090f7711c9ca493e615e43d0610ecb64dc6"
-        },
-        "setuptools": {
-            "version": "==34.3.2",
-            "hash": "sha256:6483f8412313ec787fa71379147a4605d3b1cc303c3648d02542a9160d3db72b"
-        },
-        "pyparsing": {
-            "version": "==2.2.0",
-            "hash": "sha256:fee43f17a9c4087e7ed1605bd6df994c6173c1e977d7ade7b651292fab2bd010"
-        },
-        "appdirs": {
-            "version": "==1.4.3",
-            "hash": "sha256:d8b24664561d0d34ddfaec54636d502d7cea6e29c3eaf68f3df6180863e2166e"
-        }
-    },
-    "develop": {
-        "six": {
-            "version": "==1.10.0",
-            "hash": "sha256:0ff78c403d9bccf5a425a6d31a12aa6b47f1c21ca4dc2573a7e2f32a97335eb1"
-        },
-        "funcsigs": {
-            "version": "==1.0.2",
-            "hash": "sha256:330cc27ccbf7f1e992e69fef78261dc7c6569012cf397db8d3de0234e6c937ca"
-        },
-        "imagesize": {
-            "version": "==0.7.1",
-            "hash": "sha256:6ebdc9e0ad188f9d1b2cdd9bc59cbe42bf931875e829e7a595e6b3abdc05cdfb"
-        },
-        "snowballstemmer": {
-            "version": "==1.2.1",
-            "hash": "sha256:9f3bcd3c401c3e862ec0ebe6d2c069ebc012ce142cce209c098ccb5b09136e89"
-        },
-        "Babel": {
-            "version": "==2.3.4",
-            "hash": "sha256:3318ed2960240d61cbc6558858ee00c10eed77a6508c4d1ed8e6f7f48399c975"
-        },
-        "alabaster": {
-            "version": "==0.7.10",
-            "hash": "sha256:2eef172f44e8d301d25aff8068fddd65f767a3f04b5f15b0f4922f113aa1c732"
-        },
-        "packaging": {
-            "version": "==16.8",
-            "hash": "sha256:99276dc6e3a7851f32027a68f1095cd3f77c148091b092ea867a351811cfe388"
-        },
-        "MarkupSafe": {
-            "version": "==1.0",
-            "hash": "sha256:a6be69091dac236ea9c6bc7d012beab42010fa914c459791d627dad4910eb665"
-        },
-        "pytz": {
-            "version": "==2016.10",
-            "hash": "sha256:a1ea35e87a63c7825846d5b5c81d23d668e8a102d3b1b465ce95afe1b3a2e065"
-        },
-        "Sphinx": {
-            "version": "==1.5.3",
-            "hash": "sha256:2809b2ab81906483b47c9d7e28740e3b69c160617f33d7aa11dc4ae376fd04d9"
-        },
-        "pyparsing": {
-            "version": "==2.2.0",
-            "hash": "sha256:fee43f17a9c4087e7ed1605bd6df994c6173c1e977d7ade7b651292fab2bd010"
-        },
-        "appdirs": {
-            "version": "==1.4.3",
-            "hash": "sha256:d8b24664561d0d34ddfaec54636d502d7cea6e29c3eaf68f3df6180863e2166e"
-        },
-        "Pygments": {
-            "version": "==2.2.0",
-            "hash": "sha256:78f3f434bcc5d6ee09020f92ba487f95ba50f1e3ef83ae96b9d5ffa1bab25c5d"
-        },
-        "pexpect": {
-            "version": "==4.2.1",
-            "hash": "sha256:f853b52afaf3b064d29854771e2db509ef80392509bde2dd7a6ecf2dfc3f0018"
-        },
-        "delegator.py": {
-            "version": "==0.0.8",
-            "hash": "sha256:603c1c1c76b1340520d95a1e768cf2d3a8df7b3c15a1eb9df83aac29b8d025a4"
-        },
-        "pbr": {
-            "version": "==2.0.0",
-            "hash": "sha256:d9b69a26a5cb4e3898eb3c5cea54d2ab3332382167f04e30db5e1f54e1945e45"
-        },
-        "py": {
-            "version": "==1.4.32",
-            "hash": "sha256:2d4bba2e25fff58140e6bdce1e485e89bb59776adbe01d490baa6b1f37a3dd6b"
-        },
-        "pytest": {
-            "version": "==3.0.6",
-            "hash": "sha256:da0ab50c7eec0683bc24f1c1137db1f4111752054ecdad63125e7ec71316b813"
-        },
-        "ptyprocess": {
-            "version": "==0.5.1",
-            "hash": "sha256:464cb76f7a7122743dd25507650db89cd447c51f38e4671602b3eaa2e38e05ae"
-        },
-        "docutils": {
-            "version": "==0.13.1",
-            "hash": "sha256:de454f1015958450b72641165c08afe7023cd7e3944396448f2fb1b0ccba9d77"
-        },
-        "toml": {
-            "version": "==0.9.2",
-            "hash": "sha256:b3953bffe848ad9a6d554114d82f2dcb3e23945e90b4d9addc9956f37f336594"
-        },
-        "setuptools": {
-            "version": "==34.3.2",
-            "hash": "sha256:6483f8412313ec787fa71379147a4605d3b1cc303c3648d02542a9160d3db72b"
-        },
-        "Jinja2": {
-            "version": "==2.9.5",
-            "hash": "sha256:a7b7438120dbe76a8e735ef7eba6048eaf4e0b7dbc530e100812f8ec462a4d50"
-        },
-        "requests": {
-            "version": "==2.13.0",
-            "hash": "sha256:1a720e8862a41aa22e339373b526f508ef0c8988baf48b84d3fc891a8e237efb"
-        },
-        "mock": {
-            "version": "==2.0.0",
-            "hash": "sha256:5ce3c71c5545b472da17b72268978914d0252980348636840bd34a00b5cc96c1"
-        }
-    },
     "_meta": {
+        "hash": {
+            "sha256": "b22d25806ebb5d3050975a015bcdf85cc363a550216e4bf16eec5a6194e99007"
+        },
+        "requires": {
+            "python_version": "2.7"
+        },
         "sources": [
             {
                 "url": "https://pypi.python.org/simple",
                 "verify_ssl": true
             }
-        ],
-        "requires": {
-            "python_version": "2.7"
+        ]
+    },
+    "default": {
+        "appdirs": {
+            "version": "==1.4.3"
         },
-        "hash": {
-            "sha256": "b22d25806ebb5d3050975a015bcdf85cc363a550216e4bf16eec5a6194e99007"
+        "backports.shutil_get_terminal_size": {
+            "version": "==1.0.0"
+        },
+        "packaging": {
+            "version": "==16.8"
+        },
+        "pathlib": {
+            "version": "==1.0.1"
+        },
+        "pew": {
+            "version": "==0.1.26"
+        },
+        "pyparsing": {
+            "version": "==2.2.0"
+        },
+        "pythonz-bd": {
+            "version": "==1.11.4"
+        },
+        "setuptools": {
+            "version": "==34.3.2"
+        },
+        "shutilwhich": {
+            "version": "==1.1.0"
+        },
+        "six": {
+            "version": "==1.10.0"
+        },
+        "virtualenv": {
+            "version": "==15.1.0"
+        },
+        "virtualenv-clone": {
+            "version": "==0.2.6"
+        }
+    },
+    "develop": {
+        "Babel": {
+            "version": "==2.3.4"
+        },
+        "Jinja2": {
+            "version": "==2.9.5"
+        },
+        "MarkupSafe": {
+            "version": "==1.0"
+        },
+        "Pygments": {
+            "version": "==2.2.0"
+        },
+        "Sphinx": {
+            "version": "==1.5.3"
+        },
+        "alabaster": {
+            "version": "==0.7.10"
+        },
+        "appdirs": {
+            "version": "==1.4.3"
+        },
+        "delegator.py": {
+            "version": "==0.0.8"
+        },
+        "docutils": {
+            "version": "==0.13.1"
+        },
+        "funcsigs": {
+            "version": "==1.0.2"
+        },
+        "imagesize": {
+            "version": "==0.7.1"
+        },
+        "mock": {
+            "version": "==2.0.0"
+        },
+        "packaging": {
+            "version": "==16.8"
+        },
+        "pbr": {
+            "version": "==2.0.0"
+        },
+        "pexpect": {
+            "version": "==4.2.1"
+        },
+        "ptyprocess": {
+            "version": "==0.5.1"
+        },
+        "py": {
+            "version": "==1.4.32"
+        },
+        "pyparsing": {
+            "version": "==2.2.0"
+        },
+        "pytest": {
+            "version": "==3.0.6"
+        },
+        "pytz": {
+            "version": "==2016.10"
+        },
+        "requests": {
+            "version": "==2.13.0"
+        },
+        "setuptools": {
+            "version": "==34.3.2"
+        },
+        "six": {
+            "version": "==1.10.0"
+        },
+        "snowballstemmer": {
+            "version": "==1.2.1"
+        },
+        "toml": {
+            "version": "==0.9.2"
         }
     }
 }
\ No newline at end of file
diff --git a/pipenv/cli.py b/pipenv/cli.py
index 4df996c7..1316721a 100644
--- a/pipenv/cli.py
+++ b/pipenv/cli.py
@@ -404,7 +404,7 @@ def get_downloads_info(names_map, section):
     return info
 
 
-def do_lock():
+def do_lock(no_hashes=False):
     """Executes the freeze functionality."""
 
     # Purge the virtualenv download dir, for development dependencies.
@@ -427,7 +427,10 @@ def do_lock():
     # Add Development dependencies to lockfile.
     for dep in results:
         if dep:
-            lockfile['develop'].update({dep['name']: {'hash': dep['hash'], 'version': '=={0}'.format(dep['version'])}})
+            if not no_hashes:
+                lockfile['develop'].update({dep['name']: {'hash': dep['hash'], 'version': '=={0}'.format(dep['version'])}})
+            else:
+                lockfile['develop'].update({dep['name']: {'version': '=={0}'.format(dep['version'])}})
 
     with spinner():
         # Purge the virtualenv download dir, for default dependencies.
@@ -445,7 +448,10 @@ def do_lock():
     # Add default dependencies to lockfile.
     for dep in results:
         if dep:
-            lockfile['default'].update({dep['name']: {'hash': dep['hash'], 'version': '=={0}'.format(dep['version'])}})
+            if not no_hashes:
+                lockfile['default'].update({dep['name']: {'hash': dep['hash'], 'version': '=={0}'.format(dep['version'])}})
+            else:
+                lockfile['default'].update({dep['name']: {'version': '=={0}'.format(dep['version'])}})
 
     # Properly case package names.
     lockfile = recase_file(lockfile)
@@ -736,8 +742,9 @@ def cli(ctx, where=False, venv=False, rm=False, bare=False, three=False, python=
 @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('--no-hashes', is_flag=True, default=False, help="Do not generate hashes, if locking.")
 @click.option('--ignore-hashes', is_flag=True, default=False, help="Ignore hashes when installing.")
-def install(package_name=False, more_packages=False, dev=False, three=False, python=False, system=False, lock=False, ignore_hashes=False):
+def install(package_name=False, more_packages=False, dev=False, three=False, python=False, system=False, lock=False, no_hashes=False, ignore_hashes=False):
 
     # Ensure that virtualenv is available.
     ensure_project(three=three, python=python)
@@ -784,7 +791,7 @@ def install(package_name=False, more_packages=False, dev=False, three=False, pyt
         easter_egg(package_name)
 
     if lock:
-        do_lock()
+        do_lock(no_hashes=no_hashes)
 
 
 @click.command(help="Un-installs a provided package and removes it from Pipfile, or (if none is given), un-installs all packages.")
@@ -794,9 +801,10 @@ def install(package_name=False, more_packages=False, dev=False, three=False, pyt
 @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('--no-hashes', is_flag=True, default=False, help="Do not 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.")
-def uninstall(package_name=False, more_packages=False, three=None, python=False, system=False, lock=False, dev=False, all=False):
+def uninstall(package_name=False, more_packages=False, three=None, python=False, system=False, lock=False, no_hashes=False, dev=False, all=False):
     # Ensure that virtualenv is available.
     ensure_project(three=three, python=python)
 
@@ -840,20 +848,21 @@ def uninstall(package_name=False, more_packages=False, three=None, python=False,
             project.remove_package_from_pipfile(package_name, dev)
 
         if lock:
-            do_lock()
+            do_lock(no_hashes=no_hashes)
 
 
 @click.command(help="Generates Pipfile.lock.")
 @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('--no-hashes', is_flag=True, default=False, help="Do not generate hashes.")
 @click.option('--requirements', '-r', is_flag=True, default=False, help="Generate output compatible with requirements.txt.")
-def lock(three=None, python=False, requirements=False):
+def lock(three=None, python=False, no_hashes=False, requirements=False):
     # Ensure that virtualenv is available.
     ensure_project(three=three, python=python)
 
     if requirements:
         do_init(dev=True, requirements=requirements)
-    do_lock()
+    do_lock(no_hashes=no_hashes)
 
 
 @click.command(help="Spawns a shell within the virtualenv.", context_settings=dict(