diff --git a/src/fluffyrocket/fluffyrocket.py b/src/fluffyrocket/fluffyrocket.py
index 0841ee9..6eb035f 100644
--- a/src/fluffyrocket/fluffyrocket.py
+++ b/src/fluffyrocket/fluffyrocket.py
@@ -18,6 +18,8 @@ class FluffyRocket(MiniRocketBase):
         Sharpness parameter for the sigmoid function used to compute soft PPV.
     num_features : int, default=10,000
     max_dilations_per_kernel : int, default=32
+    learnable : bool, default=False
+        Whether the sharpness parameter is learnable.
     random_state : int, default=None
 
     Examples
@@ -51,10 +53,14 @@ def __init__(
         sharpness=10.0,
         num_features=10_000,
         max_dilations_per_kernel=32,
+        learnable=False,
         random_state=None,
     ):
         super().__init__(num_features, max_dilations_per_kernel, random_state)
-        self.sharpness = sharpness
+        if learnable:
+            self.sharpness = torch.nn.Parameter(torch.tensor(sharpness))
+        else:
+            self.sharpness = sharpness
 
     def ppv(self, x, biases):
         return torch.sigmoid(self.sharpness * (x - biases)).mean(1)