diff --git a/requirements.docs.python3.5.txt b/requirements.docs.python3.5.txt
index 4ddf747..15a3ac6 100644
--- a/requirements.docs.python3.5.txt
+++ b/requirements.docs.python3.5.txt
@@ -1,7 +1,7 @@
 # used for unit tests in python 3.5 only
 # the config is separate because latest CoolProp is broken in python 3.5
 scipy==1.3.1
-numpy==1.17.2
+numpy==1.22.0
 CoolProp==6.2.1
 jupyter==1.0.0
 pandas==0.25.1
diff --git a/requirements.docs.txt b/requirements.docs.txt
index e8eb44b..80215e0 100644
--- a/requirements.docs.txt
+++ b/requirements.docs.txt
@@ -1,5 +1,5 @@
 scipy==1.5.2
-numpy==1.19.1
+numpy==1.22.0
 CoolProp==6.4.1
 jupyter==1.0.0
 pandas==1.1.0