diff --git a/dev-requirements.txt b/dev-requirements.txt
index 50a7a80..202b533 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.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
 certifi==2021.5.30
     # via requests
@@ -103,10 +103,9 @@ toml==0.10.2
     # via
     #   pytest
     #   pytest-cov
-    #   tox
 tomli==1.2.1
     # via setuptools-scm
-tox==3.24.3
+tox==3.28.0
     # via -r dev-requirements.in
 urllib3==1.26.6
     # via requests