diff --git a/.appveyor/requirements.txt b/.appveyor/requirements.txt
index 12ed0ac02e..c495fbde4b 100644
--- a/.appveyor/requirements.txt
+++ b/.appveyor/requirements.txt
@@ -4,6 +4,6 @@ numpy==1.10.4
 gdal==1.11.4
 netCDF4==1.2.2
 rasterio==0.31.0
-pyzmq==15.2.0
+pyzmq==19.0.0
 psycopg2==2.6.1
 scipy==0.17.0