From a6fd145f67d2434e8843ece44534116cdd8fd79d Mon Sep 17 00:00:00 2001
From: Alessandro Candido <candido.ale@gmail.com>
Date: Thu, 14 Nov 2024 17:04:41 +0100
Subject: [PATCH] fix: Use serializable types for custom attributes

---
 src/qibolab/_core/pulses/envelope.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/qibolab/_core/pulses/envelope.py b/src/qibolab/_core/pulses/envelope.py
index 518ee1db6..485c2116b 100644
--- a/src/qibolab/_core/pulses/envelope.py
+++ b/src/qibolab/_core/pulses/envelope.py
@@ -337,8 +337,8 @@ class Custom(BaseEnvelope):
 
     kind: Literal["custom"] = "custom"
 
-    i_: npt.NDArray
-    q_: npt.NDArray
+    i_: NdArray
+    q_: NdArray
 
     def i(self, samples: int) -> Waveform:
         """I.