diff --git a/musicflower/plotting.py b/musicflower/plotting.py
index e5ee724..b50c066 100644
--- a/musicflower/plotting.py
+++ b/musicflower/plotting.py
@@ -25,9 +25,9 @@
 
 def rgba(*args):
     if len(args) == 1:
-        rgba = np.asfarray(args[0])
+        rgba = np.asarray(args[0], dtype=float)
     else:
-        rgba = np.asfarray(args)
+        rgba = np.asarray(args, dtype=float)
     if len(rgba) not in [3, 4]:
         raise ValueError("rgba values have to be specified as (an array of) 3 or 4 values")
     if np.any(rgba > 1) or np.any(rgba < 0):
@@ -40,8 +40,8 @@ def rgba(*args):
 
 
 def rgba_mix(colors, weights, normalise=True):
-    colors = np.asfarray(colors)
-    weights = np.asfarray(weights)
+    colors = np.asarray(colors, dtype=float)
+    weights = np.asarray(weights, dtype=float)
     if np.any(weights < 0):
         raise ValueError("'weights' must be positive")
     if normalise:
@@ -447,7 +447,7 @@ def make_parallels(n_levels=5,
 def plot_pcd_marker(pcd, labels,
                     name=None, groupname=None, group=None, r=None,
                     parallels_kwargs=(), meridians_kwargs=(), label_kwargs=()):
-    pcd = np.asfarray(pcd)
+    pcd = np.asarray(pcd, dtype=float)
     amplitude, phase = get_fourier_component(pcds=pcd[None], fourier_component=5)
     x, y, z = remap_to_xyz(amplitude=amplitude, phase=phase)
     altitude = np.arctan2(z, np.sqrt(x ** 2 + y ** 2))[0]
@@ -491,10 +491,10 @@ def add_key_markers(fig, **kwargs):
 
 
 def ellipse_coords(r1, r2, centre=(0, 0, 0), n=100, plane=None):
-    centre = np.asfarray(centre)
+    centre = np.asarray(centre, dtype=float)
     if plane is None:
-        r1 = np.asfarray(r1)
-        r2 = np.asfarray(r2)
+        r1 = np.asarray(r1, dtype=float)
+        r2 = np.asarray(r2, dtype=float)
     elif plane == 'xy':
         r1 = r1 * np.array([1, 0, 0])
         r2 = r2 * np.array([0, 1, 0])
diff --git a/musicflower/util.py b/musicflower/util.py
index a6e9db2..02ff5a3 100644
--- a/musicflower/util.py
+++ b/musicflower/util.py
@@ -25,7 +25,7 @@ def get_fourier_component(pcds: np.ndarray, fourier_component: int = None) -> np
     :return:  array of shape (2, ..., n//2 + 1) with amplitude and phase along the first dimension and the different
      Fourier components along the last dimension
     """
-    pcds = np.asfarray(pcds)
+    pcds = np.asarray(pcds, dtype=float)
     pcds /= pcds.sum(axis=-1, keepdims=True)
     ft = np.fft.rfft(pcds, axis=-1)
     if fourier_component is not None:
diff --git a/musicflower/webapp.py b/musicflower/webapp.py
index 877ed14..99e036a 100644
--- a/musicflower/webapp.py
+++ b/musicflower/webapp.py
@@ -109,7 +109,7 @@ def check_features(cls, features, n=1, asfarray=True):
         if len(features) != n:
             raise ValueError(f"expected {n} features but got {len(features)}")
         if asfarray:
-            features = [np.asfarray(f) for f in features]
+            features = [np.asarray(f, dtype=float) for f in features]
         if n == 1:
             features = features[0]
         return features