diff --git a/docs/usage.ipynb b/docs/usage.ipynb
index eaf69a13..1483d7f5 100644
--- a/docs/usage.ipynb
+++ b/docs/usage.ipynb
@@ -189,7 +189,7 @@
     "    expression=model.expression,\n",
     "    parameters=model.parameter_defaults,\n",
     ")\n",
-    "intensity = LambdifiedFunction(sympy_model, backend=\"numpy\")\n",
+    "intensity = LambdifiedFunction(sympy_model, backend=\"jax\")\n",
     "data_converter = HelicityTransformer(model.adapter)\n",
     "phsp_sample = generate_phsp(100_000, model.adapter.reaction_info)\n",
     "data_sample = generate_data(\n",
@@ -246,7 +246,7 @@
    "source": [
     "phsp_set = data_converter.transform(phsp_sample)\n",
     "data_set = data_converter.transform(data_sample)\n",
-    "data_frame = pd.DataFrame(data_set.to_pandas())\n",
+    "data_frame = pd.DataFrame(data_set)\n",
     "data_frame[\"m_12\"].hist(bins=100, alpha=0.5, density=True)\n",
     "indicate_masses()\n",
     "plt.legend();"
diff --git a/docs/usage/step2.ipynb b/docs/usage/step2.ipynb
index 8e511d30..4ef1278a 100644
--- a/docs/usage/step2.ipynb
+++ b/docs/usage/step2.ipynb
@@ -277,8 +277,8 @@
     "import numpy as np\n",
     "import pandas as pd\n",
     "\n",
-    "data_frame = pd.DataFrame(data_set.to_pandas())\n",
-    "phsp_frame = pd.DataFrame(data_set.to_pandas())\n",
+    "data_frame = pd.DataFrame(data_set)\n",
+    "phsp_frame = pd.DataFrame(data_set)\n",
     "data_frame"
    ]
   },
diff --git a/src/tensorwaves/data/transform.py b/src/tensorwaves/data/transform.py
index 49d9f8cf..7c1078c7 100644
--- a/src/tensorwaves/data/transform.py
+++ b/src/tensorwaves/data/transform.py
@@ -1,5 +1,6 @@
 """Implementations of `.DataTransformer`."""
 
+import numpy as np
 from ampform.kinematics import EventCollection, HelicityAdapter
 
 from tensorwaves.interfaces import DataSample, DataTransformer
@@ -17,4 +18,5 @@ def __init__(self, helicity_adapter: HelicityAdapter) -> None:
 
     def transform(self, dataset: DataSample) -> DataSample:
         events = EventCollection({int(k): v for k, v in dataset.items()})
-        return self.__helicity_adapter.transform(events)
+        dataset = self.__helicity_adapter.transform(events)
+        return {key: np.array(values) for key, values in dataset.items()}