diff --git a/notebooks/01-overview-osmnx.ipynb b/notebooks/01-overview-osmnx.ipynb
index ec1eb20..5526bc6 100644
--- a/notebooks/01-overview-osmnx.ipynb
+++ b/notebooks/01-overview-osmnx.ipynb
@@ -67,7 +67,7 @@
    "source": [
     "# get the boundary polygon for manhattan, project it, and plot it\n",
     "city = ox.geocode_to_gdf(\"Manhattan, New York, USA\")\n",
-    "city_proj = ox.project_gdf(city)\n",
+    "city_proj = ox.projection.project_gdf(city)\n",
     "ax = city_proj.plot(fc=\"gray\", ec=\"none\")\n",
     "_ = ax.axis(\"off\")"
    ]
@@ -88,7 +88,7 @@
     "]\n",
     "east_bay = ox.geocode_to_gdf(place_names)\n",
     "east_bay.to_file(\"./data/east_bay.gpkg\", driver=\"GPKG\")\n",
-    "east_bay = ox.project_gdf(east_bay)\n",
+    "east_bay = ox.projection.project_gdf(east_bay)\n",
     "ax = east_bay.plot(fc=\"gray\", ec=\"none\")\n",
     "_ = ax.axis(\"off\")"
    ]
diff --git a/notebooks/03-graph-place-queries.ipynb b/notebooks/03-graph-place-queries.ipynb
index 1f12f5a..6c0d92c 100644
--- a/notebooks/03-graph-place-queries.ipynb
+++ b/notebooks/03-graph-place-queries.ipynb
@@ -121,8 +121,8 @@
     ")\n",
     "\n",
     "# the city is a very small part of the county\n",
-    "alameda1 = ox.project_gdf(alameda1)\n",
-    "alameda2 = ox.project_gdf(alameda2)\n",
+    "alameda1 = ox.projection.project_gdf(alameda1)\n",
+    "alameda2 = ox.projection.project_gdf(alameda2)\n",
     "alameda2.area.iloc[0] / alameda1.area.iloc[0]"
    ]
   },
@@ -173,7 +173,7 @@
    "source": [
     "# you can pass multiple queries with mixed types (dicts and strings)\n",
     "mx_gt_tx = ox.geocode_to_gdf([{\"country\": \"Mexico\"}, \"Guatemala\", {\"state\": \"Texas\"}])\n",
-    "mx_gt_tx = ox.project_gdf(mx_gt_tx)\n",
+    "mx_gt_tx = ox.projection.project_gdf(mx_gt_tx)\n",
     "ax = mx_gt_tx.plot(fc=\"gray\", ec=\"w\")\n",
     "_ = ax.axis(\"off\")"
    ]
@@ -192,7 +192,7 @@
    "outputs": [],
    "source": [
     "france = ox.geocode_to_gdf(\"France\")\n",
-    "france = ox.project_gdf(france)\n",
+    "france = ox.projection.project_gdf(france)\n",
     "ax = france.plot(fc=\"gray\", ec=\"none\")\n",
     "_ = ax.axis(\"off\")"
    ]
@@ -203,7 +203,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "france = ox.project_gdf(ox.geocode_to_gdf(\"R1403916\", by_osmid=True))\n",
+    "france = ox.projection.project_gdf(ox.geocode_to_gdf(\"R1403916\", by_osmid=True))\n",
     "ax = france.plot(fc=\"gray\", ec=\"none\")\n",
     "_ = ax.axis(\"off\")"
    ]
diff --git a/notebooks/06-stats-indicators-centrality.ipynb b/notebooks/06-stats-indicators-centrality.ipynb
index 3b066c1..5f661fa 100644
--- a/notebooks/06-stats-indicators-centrality.ipynb
+++ b/notebooks/06-stats-indicators-centrality.ipynb
@@ -62,7 +62,7 @@
     "# get the street network for a place, and its area in square meters\n",
     "place = \"Piedmont, California, USA\"\n",
     "gdf = ox.geocode_to_gdf(place)\n",
-    "area = ox.project_gdf(gdf).unary_union.area\n",
+    "area = ox.projection.project_gdf(gdf).unary_union.area\n",
     "G = ox.graph_from_place(place, network_type=\"drive\")"
    ]
   },
diff --git a/notebooks/10-building-footprints.ipynb b/notebooks/10-building-footprints.ipynb
index e3543f4..5fed42d 100644
--- a/notebooks/10-building-footprints.ipynb
+++ b/notebooks/10-building-footprints.ipynb
@@ -58,7 +58,7 @@
    "outputs": [],
    "source": [
     "gdf = ox.features_from_place(\"Piedmont, California, USA\", tags)\n",
-    "gdf_proj = ox.project_gdf(gdf)\n",
+    "gdf_proj = ox.projection.project_gdf(gdf)\n",
     "fp = f\"./{img_folder}/piedmont_bldgs.{extension}\"\n",
     "fig, ax = ox.plot_footprints(gdf_proj, filepath=fp, dpi=400, save=True, show=False, close=True)\n",
     "Image(fp, height=size, width=size)"