diff --git a/murenn/dtcwt/nn.py b/murenn/dtcwt/nn.py
index 89fc9de..58b4154 100644
--- a/murenn/dtcwt/nn.py
+++ b/murenn/dtcwt/nn.py
@@ -9,7 +9,7 @@ class MuReNNDirect(torch.nn.Module):
     """
     Args:
         J (int): Number of levels (octaves) in the DTCWT decomposition.
-        Q (int, dict or list): Number of Conv1D filters per octave.
+        Q (int or list): Number of Conv1D filters per octave.
         T (int): Conv1D Kernel size multiplier. The Conv1d kernel size at scale j is equal to
           T * Q[j] where Q[j] is the number of filters.
         J_phi (int): Number of levels of downsampling. Stride is 2**J_phi. Default is J.
@@ -21,11 +21,11 @@ def __init__(self, *, J, Q, T, in_channels, J_phi=None, padding_mode="symmetric"
         super().__init__()
         if isinstance(Q, int):
             self.Q = [Q for j in range(J)]
-        elif isinstance(Q, (dict, list)):
+        elif isinstance(Q, list):
             assert len(Q) == J
             self.Q = Q
         else:
-            raise TypeError(f"Q must to be int, dict or list, got {type(Q)}")
+            raise TypeError(f"Q must to be int or list, got {type(Q)}")
         if J_phi is None:
             J_phi = J
         if J_phi < J: