diff --git a/conda/recipes/versions.yaml b/conda/recipes/versions.yaml
index 3463d6bb..f4b8edd9 100644
--- a/conda/recipes/versions.yaml
+++ b/conda/recipes/versions.yaml
@@ -47,11 +47,11 @@ cupy_version:
 cython_version:
   - '>=0.29.17,<0.30'
 dask_version:
-  - '>=2021.3.1'
+  - '=2021.4.0'
 datashader_version:
   - '>=0.11.1,<0.12'
 distributed_version:
-  - '>=2.23.0'
+  - '>=2.23.0,<=2021.4.0'
 dlpack_version:
   - '>=0.3,<0.4.0a0'
 double_conversion_version: