diff --git a/changelog/4912.trivial.rst b/changelog/4912.trivial.rst
index 9c5ca6d8e..9600c833b 100644
--- a/changelog/4912.trivial.rst
+++ b/changelog/4912.trivial.rst
@@ -1 +1,2 @@
-Remove deprecated Sphinx directive, ``add_description_unit()``.
+Remove deprecated Sphinx directive, ``add_description_unit()``,
+pin sphinx-removed-in to >= 0.2.0 to support Sphinx 2.0.
diff --git a/doc/en/requirements.txt b/doc/en/requirements.txt
index 320ee8dcd..be22b7db8 100644
--- a/doc/en/requirements.txt
+++ b/doc/en/requirements.txt
@@ -1,4 +1,4 @@
 pygments-pytest>=1.1.0
-sphinx>=1.8.2,<2.0
+sphinx>=1.8.2,<2.1
 sphinxcontrib-trio
-sphinx-removed-in>=0.1.3
+sphinx-removed-in>=0.2.0