diff --git a/ocp-tutorial/OCP-introduction.ipynb b/ocp-tutorial/OCP-introduction.ipynb
index 22acadb..095919d 100644
--- a/ocp-tutorial/OCP-introduction.ipynb
+++ b/ocp-tutorial/OCP-introduction.ipynb
@@ -180,8 +180,8 @@
    ],
    "source": [
     "from ocpmodels.common.relaxation.ase_utils import OCPCalculator\n",
-    "calc = OCPCalculator(checkpoint=os.path.expanduser(checkpoint), cpu=False)\n",
-    "# calc = OCPCalculator(checkpoint=os.path.expanduser(checkpoint), cpu=True)"
+    "calc = OCPCalculator(checkpoint_path=os.path.expanduser(checkpoint), cpu=False)\n",
+    "# calc = OCPCalculator(checkpoint_path=os.path.expanduser(checkpoint), cpu=True)"
    ]
   },
   {