diff --git a/notebooks/IFU_cube_continuum_fit/NGC4151_FeII_ContinuumFit.ipynb b/notebooks/IFU_cube_continuum_fit/NGC4151_FeII_ContinuumFit.ipynb
index 9b88174ad..0bda20cc5 100644
--- a/notebooks/IFU_cube_continuum_fit/NGC4151_FeII_ContinuumFit.ipynb
+++ b/notebooks/IFU_cube_continuum_fit/NGC4151_FeII_ContinuumFit.ipynb
@@ -541,7 +541,7 @@
    "outputs": [],
    "source": [
     "# List available data\n",
-    "print(cubeviz.app.data_collection)"
+    "print(cubeviz.data_labels)"
    ]
   },
   {
diff --git a/notebooks/ifu_optimal/ifu_optimal.ipynb b/notebooks/ifu_optimal/ifu_optimal.ipynb
index 2af8ef5d3..d1920ca40 100644
--- a/notebooks/ifu_optimal/ifu_optimal.ipynb
+++ b/notebooks/ifu_optimal/ifu_optimal.ipynb
@@ -300,7 +300,7 @@
     "\n",
     "print(\"\\nSource\")\n",
     "try:\n",
-    "    spectrum_subset1 = cubeviz.get_data(cubeviz.app.data_collection[0].label,\n",
+    "    spectrum_subset1 = cubeviz.get_data(cubeviz.data_labels[0].label,\n",
     "                                        spatial_subset=\"Subset 1\", function=\"mean\")\n",
     "    print(spectrum_subset1)\n",
     "except Exception:\n",
diff --git a/notebooks/mos_spectroscopy_advanced/MOSspec_advanced.ipynb b/notebooks/mos_spectroscopy_advanced/MOSspec_advanced.ipynb
index 196e9db0e..de40538c3 100644
--- a/notebooks/mos_spectroscopy_advanced/MOSspec_advanced.ipynb
+++ b/notebooks/mos_spectroscopy_advanced/MOSspec_advanced.ipynb
@@ -470,8 +470,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# List what is in the data menu\n",
-    "[d.label for d in specviz.app.data_collection]"
+    "# List what's in the data menu\n",
+    "specviz.data_labels"
    ]
   },
   {