diff --git a/requirements.txt b/requirements.txt
index c22239e..fd8bcad 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-numpy==1.9.2
+numpy==1.22.0
 Pint==0.5.1
 uncertainties==2.4.4
diff --git a/setup.py b/setup.py
index 6666189..3230149 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@
         '{}.examples'.format(package_name)
     ],
     include_package_data=True,
-    install_requires = [ 'numpy==1.9.2', 'Pint==0.5.1', 'uncertainties==2.4.4' ],
+    install_requires = [ 'numpy==1.22.0', 'Pint==0.5.1', 'uncertainties==2.4.4' ],
     license = 'MIT',
     keywords = ['gnuplot', 'graph', 'plot', 'panel'],
 )