diff --git a/requirements/docs.txt b/requirements/docs.txt
index 623c766..8d24eb8 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -2,3 +2,6 @@ sphinx_rtd_theme
 # Pinned to 1.6.2 due to a bug in 1.6.3. See GitHub PR #270 for details.
 # TODO: remove this restriction once 1.6.4 or later is released.
 sphinx==1.6.2
+# Pinned to 3.0.3 to prevent an issue with Sphinx
+# See https://github.com/PyCQA/pydocstyle/pull/585
+Jinja2==3.0.3
diff --git a/requirements/tests.txt b/requirements/tests.txt
index d6bf398..ed12797 100644
--- a/requirements/tests.txt
+++ b/requirements/tests.txt
@@ -1,6 +1,6 @@
 pytest==6.2.5
 mypy==0.930
-black==21.12b0
+black==22.3
 isort==5.4.2
 types-toml
 types-setuptools