diff --git a/.appveyor/requirements.txt b/.appveyor/requirements.txt
index 12ed0ac02e..9bb227a430 100644
--- a/.appveyor/requirements.txt
+++ b/.appveyor/requirements.txt
@@ -1,6 +1,6 @@
 --find-links https://s3.amazonaws.com/agdc-publicfiles/python-wheels/index.html
 
-numpy==1.10.4
+numpy==1.18.4
 gdal==1.11.4
 netCDF4==1.2.2
 rasterio==0.31.0