diff --git a/docs/requirements.txt b/docs/requirements.txt
index 287c3c0..4071a45 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -13,7 +13,7 @@ imagesize==1.1.0
 Jinja2==2.10
 MarkupSafe==1.1.0
 more-itertools==4.3.0
-numpy==1.15.4
+numpy==1.22.0
 packaging==18.0
 pluggy==0.8.0
 py==1.7.0
diff --git a/requirements.txt b/requirements.txt
index 467a174..3c90562 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ more-itertools==4.3.0
 nbconvert==5.4.0
 nbformat==4.4.0
 notebook==5.7.0
-numpy==1.15.4
+numpy==1.22.0
 packaging==19.0
 pandas==0.23.4
 pandocfilters==1.4.2