diff --git a/requirements/core.txt b/requirements/core.txt
index a078710396..4928e74a54 100644
--- a/requirements/core.txt
+++ b/requirements/core.txt
@@ -10,4 +10,4 @@ numpy
 scipy
 # pyke (not pip installable)  #conda: pyke
 cf_units
-dask>=0.15.0
+dask>=0.17.1