diff --git a/requirements.txt b/requirements.txt
index fb0e75b..c65a825 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,7 @@ clisops>=0.9.6,<0.11
 roocs-utils>=0.6.4,<0.7
 # roocs-utils @ git+https://github.com/roocs/roocs-utils@master#egg=roocs-utils
 xarray>=0.20,<0.22
+cf-xarray<=0.8.4
 dask[complete]
 netcdf4
 # workflow