diff --git a/python/damask/util.py b/python/damask/util.py
index fb122bd11..cda532bc0 100644
--- a/python/damask/util.py
+++ b/python/damask/util.py
@@ -183,7 +183,7 @@ def scale_to_coprime(v):
         # Python 3.9 provides math.lcm, see https://stackoverflow.com/questions/51716916.
         return a * b // np.gcd(a, b)
 
-    m = (np.array(v) * reduce(lcm, map(lambda x: int(get_square_denominator(x)),v)) ** 0.5).astype(np.int)
+    m = (np.array(v) * reduce(lcm, map(lambda x: int(get_square_denominator(x)),v)) ** 0.5).astype(int)
     m = m//reduce(np.gcd,m)
 
     with np.errstate(invalid='ignore'):
diff --git a/python/tests/test_Grid.py b/python/tests/test_Grid.py
index 48831f917..a239165db 100644
--- a/python/tests/test_Grid.py
+++ b/python/tests/test_Grid.py
@@ -347,7 +347,7 @@ class TestGrid:
     @pytest.mark.parametrize('approach',['Laguerre','Voronoi'])
     def test_tessellate_bicrystal(self,approach):
         cells = np.random.randint(5,10,3)*2
-        size  = cells.astype(np.float)
+        size  = cells.astype(float)
         seeds = np.vstack((size*np.array([0.5,0.25,0.5]),size*np.array([0.5,0.75,0.5])))
         material = np.zeros(cells)
         material[:,cells[1]//2:,:] = 1