diff --git a/requirements.txt b/requirements.txt
index c003723..682650f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-numpy==1.15.1
+numpy==1.22.0
 scipy==1.1.0
 nibabel==2.2.1
 pytest-cov==2.6.0
diff --git a/setup.py b/setup.py
index 896bebd..042f765 100644
--- a/setup.py
+++ b/setup.py
@@ -52,7 +52,7 @@
       author='Ingo Marquardt',
       author_email='ingo.marquardt@gmx.de',
       license='GNU General Public License Version 3',
-      install_requires=['numpy==1.15.1', 'scipy==1.1.0', 'nibabel==2.2.1',
+      install_requires=['numpy==1.22.0', 'scipy==1.1.0', 'nibabel==2.2.1',
                         'pillow==8.1.1', 'cython==0.27.1',
                         'tensorflow==1.4.0', 'h5py==2.8.0'],
       # setup_requires=['numpy'],