diff --git a/ci/requirements/py36-min-all-deps.yml b/ci/requirements/py36-min-all-deps.yml
index 4e4f8550e16..297e379bd7b 100644
--- a/ci/requirements/py36-min-all-deps.yml
+++ b/ci/requirements/py36-min-all-deps.yml
@@ -13,7 +13,7 @@ dependencies:
   - cartopy=0.17
   - cdms2=3.1
   - cfgrib=0.9
-  - cftime=1.0
+  - cftime=1.0.0
   - coveralls
   - dask=1.2
   - distributed=1.27