diff --git a/docs/changes/2569.bugfix.rst b/docs/changes/2569.bugfix.rst
new file mode 100644
index 00000000000..51025ebeadc
--- /dev/null
+++ b/docs/changes/2569.bugfix.rst
@@ -0,0 +1 @@
+Replace deprecated usage of scipy sparse matrices, adds support for scipy 1.14.
diff --git a/src/ctapipe/instrument/camera/geometry.py b/src/ctapipe/instrument/camera/geometry.py
index 07eee6815d0..ab8aa84e94d 100644
--- a/src/ctapipe/instrument/camera/geometry.py
+++ b/src/ctapipe/instrument/camera/geometry.py
@@ -708,7 +708,7 @@ def neighbors(self):
 
     @lazyproperty
     def neighbor_matrix(self):
-        return self.neighbor_matrix_sparse.A
+        return self.neighbor_matrix_sparse.toarray()
 
     @lazyproperty
     def max_neighbors(self):
@@ -941,7 +941,7 @@ def get_border_pixel_mask(self, width=1):
             warnings.filterwarnings("ignore", category=PendingDeprecationWarning)
 
             if width == 1:
-                n_neighbors = self.neighbor_matrix_sparse.sum(axis=1).A1
+                n_neighbors = np.asarray(self.neighbor_matrix_sparse.sum(axis=0))[0]
                 max_neighbors = n_neighbors.max()
                 mask = n_neighbors < max_neighbors
             else: