diff --git a/.appveyor/requirements.txt b/.appveyor/requirements.txt
index 12ed0ac02e..aad474fee1 100644
--- a/.appveyor/requirements.txt
+++ b/.appveyor/requirements.txt
@@ -5,5 +5,5 @@ gdal==1.11.4
 netCDF4==1.2.2
 rasterio==0.31.0
 pyzmq==15.2.0
-psycopg2==2.6.1
+psycopg2==2.8.4
 scipy==0.17.0