diff --git a/requirements/doc/doc-requirements.txt b/requirements/doc/doc-requirements.txt
index e3eb27794305..afb5c4105fae 100644
--- a/requirements/doc/doc-requirements.txt
+++ b/requirements/doc/doc-requirements.txt
@@ -7,7 +7,7 @@
 # Install the documentation requirements with:
 #     pip install -r requirements/doc/doc-requirements.txt
 #
-sphinx>=1.8.1,!=2.0.0,<4.3.0
+sphinx>=1.8.1,!=2.0.0
 colorspacious
 ipython
 ipywidgets