diff --git a/pipenv/core.py b/pipenv/core.py
index faea4dd5..e75f12c0 100644
--- a/pipenv/core.py
+++ b/pipenv/core.py
@@ -1218,7 +1218,7 @@ def do_init(
     if (project.lockfile_exists and not ignore_pipfile) and not skip_lock:
         old_hash = project.get_lockfile_hash()
         new_hash = project.calculate_pipfile_hash()
-        if new_hash != old_hash:
+        if new_hash.value != old_hash:
             if deploy:
                 click.secho(
                     "Your Pipfile.lock ({}) is out of date. Expected: ({}).".format(
@@ -1244,7 +1244,7 @@ def do_init(
                 else:
                     msg = fix_utf8("Pipfile.lock is corrupted, replaced with ({1})...")
                 click.secho(
-                    msg.format(old_hash[-6:], new_hash[-6:]),
+                    msg.format(old_hash[-6:], new_hash.value[-6:]),
                     fg="yellow",
                     bold=True,
                     err=True,
diff --git a/pipenv/project.py b/pipenv/project.py
index fb4df7a1..8f4a8986 100644
--- a/pipenv/project.py
+++ b/pipenv/project.py
@@ -556,14 +556,16 @@ class Project:
     @property
     def _lockfile(self):
         """Pipfile.lock divided by PyPI and external dependencies."""
-        pfile = plette.Pipfile.load(self.pipfile_location)
-        lockfile = json.loads(pfile.lock())
+        lockfile = plette.Lockfile.with_meta_from(
+            plette.Pipfile.load(open(self.pipfile_location))
+        )
         for section in ("default", "develop"):
             lock_section = lockfile.get(section, {})
             for key in list(lock_section.keys()):
                 norm_key = pep423_name(key)
                 lockfile[section][norm_key] = lock_section.pop(key)
-        return lockfile
+
+        return lockfile._data
 
     @property
     def _pipfile(self):
@@ -1008,8 +1010,8 @@ class Project:
 
     def calculate_pipfile_hash(self):
         # Update the lockfile if it is out-of-date.
-        p = plette.Pipfile.load(self.pipfile_location)
-        return p.hash
+        p = plette.Pipfile.load(open(self.pipfile_location))
+        return p.get_hash()
 
     def ensure_proper_casing(self):
         """Ensures proper casing of Pipfile packages"""