diff --git a/docs/requirements.txt b/docs/requirements.txt
index 8acece5..3295f58 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -7,7 +7,7 @@ ipyparallel==6.2.2
 lxml==4.6.3
 matplotlib==2.2.3
 numexpr==2.6.8
-numpy==1.15.2
+numpy==1.22.0
 pandas==0.23.4
 python-dateutil==2.7.3
 scipy==1.1.0
diff --git a/rtd.requirements.txt b/rtd.requirements.txt
index e28bd36..717c18f 100644
--- a/rtd.requirements.txt
+++ b/rtd.requirements.txt
@@ -9,7 +9,7 @@ ipyparallel==6.2.2
 lxml==4.2.5
 matplotlib==2.2.3
 numexpr==2.6.8
-numpy==1.15.2
+numpy==1.22.0
 pandas==0.23.4
 python-dateutil==2.7.3
 scipy==1.1.0