diff --git a/requirements_rtd.txt b/requirements_rtd.txt
index dea98d2..4d334a4 100644
--- a/requirements_rtd.txt
+++ b/requirements_rtd.txt
@@ -1,4 +1,4 @@
-numpy == 1.16.4
+numpy == 1.22.0
 fastkml
 shapely
 utm