diff --git a/src/spikeanalysis/analysis_utils/histogram_functions.py b/src/spikeanalysis/analysis_utils/histogram_functions.py
index bda257a..7a315f7 100644
--- a/src/spikeanalysis/analysis_utils/histogram_functions.py
+++ b/src/spikeanalysis/analysis_utils/histogram_functions.py
@@ -23,7 +23,7 @@ def spike_times_to_bins(
 
 def rasterize(time_stamps: np.array) -> tuple[np.array, np.array]:
     x_out = np.empty((len(time_stamps) * 3))
-    x_out[:] = np.NaN
+    x_out[:] = np.nan
 
     x_out[0:-1:3] = time_stamps
     x_out[1:-1:3] = time_stamps