diff --git a/deeptools/computeMatrixOperations.py b/deeptools/computeMatrixOperations.py
index 0224f00a39..8e03070521 100755
--- a/deeptools/computeMatrixOperations.py
+++ b/deeptools/computeMatrixOperations.py
@@ -7,6 +7,7 @@
 import os
 import csv
 from importlib.metadata import version
+import warnings
 
 
 def parse_arguments():
@@ -427,7 +428,7 @@ def filterHeatmapValues(hm, minVal, maxVal):
         minVal = -np.inf
     if maxVal is None:
         maxVal = np.inf
-    np.warnings.filterwarnings('ignore')
+    warnings.filterwarnings('ignore')
     for i, (x, y) in enumerate(zip(np.nanmin(hm.matrix.matrix, axis=1), np.nanmax(hm.matrix.matrix, axis=1))):
         # x/y will be nan iff a row is entirely nan. Don't filter.
         if np.isnan(x) or (x >= minVal and y <= maxVal):