diff --git a/requirements.txt b/requirements.txt
index 1f086fdf..e98461f4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 dask[distributed]>=2.30.0
-numpy>=1.12.1
+numpy>=1.12.1,<2
 scipy>=0.19
 matplotlib>=1.1,<3.9
 GPy>=1.0.9
diff --git a/tests/unit/test_testbench.py b/tests/unit/test_testbench.py
index adf191d6..49d2f2e9 100644
--- a/tests/unit/test_testbench.py
+++ b/tests/unit/test_testbench.py
@@ -1,5 +1,4 @@
 import numpy as np
-from numpy.lib.function_base import quantile
 import pytest
 
 import elfi