diff --git a/requirements/dev.txt b/requirements/dev.txt
index 5cbfca4d..5b145777 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -10,7 +10,7 @@ attrs==21.2.0
     # via pytest
 babel==2.9.1
     # via sphinx
-backports.entry-points-selectable==1.1.0
+backports-entry-points-selectable==1.1.0
     # via virtualenv
 blinker==1.4
     # via -r requirements/tests.in
@@ -88,7 +88,7 @@ six==1.16.0
     #   virtualenv
 snowballstemmer==2.1.0
     # via sphinx
-sphinx==4.2.0
+sphinx==5.1.1
     # via
     #   -r requirements/docs.in
     #   pallets-sphinx-themes
diff --git a/requirements/docs.txt b/requirements/docs.txt
index bd47a92d..1063d795 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -38,7 +38,7 @@ requests==2.26.0
     # via sphinx
 snowballstemmer==2.1.0
     # via sphinx
-sphinx==4.2.0
+sphinx==5.1.1
     # via
     #   -r requirements/docs.in
     #   pallets-sphinx-themes
@@ -62,6 +62,3 @@ sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
 urllib3==1.26.7
     # via requests
-
-# The following packages are considered to be unsafe in a requirements file:
-# setuptools