diff --git a/app.py b/app.py
index df05634..01f4a52 100644
--- a/app.py
+++ b/app.py
@@ -110,7 +110,7 @@ def read_data(output_file: str) -> pd.DataFrame:
             c2.selectbox("Select config file", list(set(st.session_state.all_files)))
         )
         fps = c3.number_input(
-            "fps", min_value=1, max_value=32, value=1, help="show every nth frame"
+            "fps", min_value=8, max_value=32, value=1, help="show every nth frame"
         )
         if c1.button("Run Simulation"):
             if Path(OUTPUT_FILE).exists():
diff --git a/src/utilities.py b/src/utilities.py
index 6bf72a3..cc492dc 100644
--- a/src/utilities.py
+++ b/src/utilities.py
@@ -214,7 +214,7 @@ def add_polygon_traces(fig: Figure, walkable_area: pedpy.WalkableArea) -> None:
         polygons (dict): Dictionary of polygons representing accessible areas.
     """
 
-    x, y = walkable_area.exterior.xy
+    x, y = walkable_area.polygon.exterior.xy
     x = np.array(x)
     y = np.array(y)
     fig.add_trace(