diff --git a/src/spectrumdevice/devices/awg/synthesis.py b/src/spectrumdevice/devices/awg/synthesis.py
index 3f16ce2..e4f2747 100644
--- a/src/spectrumdevice/devices/awg/synthesis.py
+++ b/src/spectrumdevice/devices/awg/synthesis.py
@@ -1,10 +1,10 @@
-from numpy import float_, iinfo, issubdtype, signedinteger, pi, sin, linspace, int_, ones, int16
+from numpy import float64, iinfo, issubdtype, signedinteger, pi, sin, linspace, int_, ones, int16
 from numpy.typing import NDArray
 
 
 def make_full_scale_sine_waveform(
     frequency_in_hz: float, sample_rate_in_hz: int, num_cycles: float, dtype: type = int16
-) -> tuple[NDArray[float_], NDArray[int_]]:
+) -> tuple[NDArray[float64], NDArray[int_]]:
     """Create a sine waveform covering the full range of the given data type. The resulting waveform is intended to
     be transferred to the AWG's on-board memory for generation.
 
@@ -25,7 +25,7 @@ def make_full_scale_sine_waveform(
 
 def make_full_scale_rect_waveform(
     sample_rate_in_hz: int, duration_in_seconds: float, dtype: type = int16
-) -> tuple[NDArray[float_], NDArray[int_]]:
+) -> tuple[NDArray[float64], NDArray[int_]]:
     """Create a rectangular waveform covering the full range of the given data type. The resulting waveform is intended
     to be transferred to the AWG's on-board memory for generation.
 
diff --git a/src/spectrumdevice/devices/digitiser/digitiser_card.py b/src/spectrumdevice/devices/digitiser/digitiser_card.py
index a67ceae..942d915 100644
--- a/src/spectrumdevice/devices/digitiser/digitiser_card.py
+++ b/src/spectrumdevice/devices/digitiser/digitiser_card.py
@@ -7,7 +7,7 @@
 import logging
 from typing import List, Optional, Sequence, cast
 
-from numpy import float_, int16, mod, squeeze, zeros
+from numpy import float64, int16, mod, squeeze, zeros
 from numpy.typing import NDArray
 
 from spectrum_gmbh.py_header.regs import (
@@ -173,13 +173,13 @@ def get_raw_waveforms(self) -> List[List[NDArray[int16]]]:
 
         return repeat_acquisitions
 
-    def get_waveforms(self) -> List[List[NDArray[float_]]]:
+    def get_waveforms(self) -> List[List[NDArray[float64]]]:
         """Get a list of the most recently transferred waveforms, in channel order, in Volts as floats.
 
         See get_raw_waveforms() for details.
 
         Returns:
-             waveforms (List[List[NDArray[float_]]]): A list of lists of 1D numpy arrays, one inner list per acquisition
+             waveforms (List[List[NDArray[float64]]]): A list of lists of 1D numpy arrays, one inner list per acquisition
              and one array per enabled channel, in channel order. To average the acquisitions:
                 `np.array(waveforms).mean(axis=0)`
 
diff --git a/src/spectrumdevice/devices/digitiser/digitiser_star_hub.py b/src/spectrumdevice/devices/digitiser/digitiser_star_hub.py
index 52e1b44..5351a61 100644
--- a/src/spectrumdevice/devices/digitiser/digitiser_star_hub.py
+++ b/src/spectrumdevice/devices/digitiser/digitiser_star_hub.py
@@ -7,7 +7,7 @@
 from threading import Thread
 from typing import Callable, Dict, List, Optional, Sequence, TypeVar
 
-from numpy import float_, int16
+from numpy import float64, int16
 from numpy.typing import NDArray
 
 from spectrumdevice.devices.abstract_device import (
@@ -23,7 +23,7 @@
 from spectrumdevice.settings.device_modes import AcquisitionMode
 
 
-WAVEFORM_TYPE_VAR = TypeVar("WAVEFORM_TYPE_VAR", NDArray[float_], NDArray[int16])
+WAVEFORM_TYPE_VAR = TypeVar("WAVEFORM_TYPE_VAR", NDArray[float64], NDArray[int16])
 
 
 # noinspection PyTypeChecker
@@ -73,14 +73,14 @@ def wait_for_acquisition_to_complete(self) -> None:
         for card in self._child_cards:
             card.wait_for_acquisition_to_complete()
 
-    def get_waveforms(self) -> List[List[NDArray[float_]]]:
+    def get_waveforms(self) -> List[List[NDArray[float64]]]:
         """Get a list of the most recently transferred waveforms, as floating point voltages.
 
         This method gets the waveforms from each child card and joins them into a new list, ordered by channel number.
         See `SpectrumDigitiserCard.get_waveforms()` for more information.
 
         Returns:
-            waveforms (List[List[NDArray[float_]]]): A list lists of 1D numpy arrays, one inner list per acquisition,
+            waveforms (List[List[NDArray[float64]]]): A list lists of 1D numpy arrays, one inner list per acquisition,
               and one array per enabled channel, in channel order.
         """
         return self._get_waveforms_in_threads(SpectrumDigitiserCard.get_waveforms)
diff --git a/src/spectrumdevice/measurement.py b/src/spectrumdevice/measurement.py
index 0f1f755..c0f165c 100644
--- a/src/spectrumdevice/measurement.py
+++ b/src/spectrumdevice/measurement.py
@@ -2,11 +2,11 @@
 from dataclasses import dataclass
 from typing import List, Optional
 
-from numpy import float_, int16
+from numpy import int16, float64
 from numpy.typing import NDArray
 
 
-VoltageWaveformType = NDArray[float_]
+VoltageWaveformType = NDArray[float64]
 RawWaveformType = NDArray[int16]