diff --git a/requirements-dev.txt b/requirements-dev.txt
index abb9e15..8ce6a58 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 matplotlib==2.2.3
-numpy==1.15.4
+numpy==1.22.0
 pytest==3.10.1
 pytest-pep8==1.0.6
 pytest-cov==2.6.0
diff --git a/requirements.txt b/requirements.txt
index a931a92..bfaaf2b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
 matplotlib==2.2.3
-numpy==1.15.4
+numpy==1.22.0