diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@ from setuptools import setup, find_packages
 general_requirements = [
     'dpath == 1.4.2',
     'pytest >= 4.4.1, < 6.0.0',  # For openfisca test
-    'numpy >= 1.11, < 1.19',
+    'numpy >= 1.11, < 1.18',
     'psutil >= 5.4.7, < 6.0.0',
     'PyYAML >= 3.10',
     'sortedcontainers == 2.1.0',
Downgrade Numpy to <I>