diff --git a/ci/environment.yml b/ci/environment.yml
index e2877f43..286ff214 100644
--- a/ci/environment.yml
+++ b/ci/environment.yml
@@ -13,4 +13,4 @@ dependencies:
   - xarray
   - pip:
       - git+https://github.com/dask/distributed
-      - git+https://github.com/dask/dask
+      - git+https://github.com/dask/dask@legacy-dataframe