diff --git a/folium/features.py b/folium/features.py
index 8385b3d46e..a08dc898a0 100644
--- a/folium/features.py
+++ b/folium/features.py
@@ -1514,6 +1514,7 @@ def __init__(
             # then we 'correct' the last edge for numpy digitize
             # (we add a very small amount to fake an inclusive right interval)
             increasing = bin_edges[0] <= bin_edges[-1]
+            bin_edges = bin_edges.astype(float)
             bin_edges[-1] = np.nextafter(
                 bin_edges[-1], (1 if increasing else -1) * np.inf
             )