diff --git a/docs/environment.yml b/docs/environment.yml
index bf0124e366..9e52f4607b 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -7,8 +7,8 @@ dependencies:
 - nbformat
 - jupyter_client
 - ipykernel
+- sphinx
 - pip:
-  - sphinx<1.4
   - nbsphinx
   - Send2Trash
   - prometheus_client