diff --git a/dev-requirements.txt b/dev-requirements.txt
index 2096c34..e5c6c4e 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -10,25 +10,27 @@ attrs==21.2.0
     # via pytest
 babel==2.9.1
     # via sphinx
-backports-entry-points-selectable==1.1.0
-    # via virtualenv
+cachetools==5.3.3
+    # via tox
 certifi==2023.7.22
     # via requests
+chardet==5.2.0
+    # via tox
 charset-normalizer==2.0.6
     # via requests
+colorama==0.4.6
+    # via tox
 commonmark==0.9.1
     # via recommonmark
 coverage[toml]==5.5
-    # via
-    #   coverage
-    #   pytest-cov
-distlib==0.3.2
+    # via pytest-cov
+distlib==0.3.8
     # via virtualenv
 docutils==0.17.1
     # via
     #   recommonmark
     #   sphinx
-filelock==3.0.12
+filelock==3.15.4
     # via
     #   tox
     #   virtualenv
@@ -42,26 +44,27 @@ jinja2==3.1.3
     # via sphinx
 markupsafe==2.0.1
     # via jinja2
-packaging==21.0
+packaging==24.1
     # via
+    #   pyproject-api
     #   pytest
     #   setuptools-scm
     #   sphinx
     #   tox
-platformdirs==2.3.0
-    # via virtualenv
-pluggy==1.0.0
+platformdirs==4.2.2
     # via
-    #   pytest
     #   tox
-py==1.10.0
+    #   virtualenv
+pluggy==1.5.0
     # via
     #   pytest
     #   tox
+py==1.10.0
+    # via pytest
 pygments==2.15.0
     # via sphinx
-pyparsing==2.4.7
-    # via packaging
+pyproject-api==1.7.1
+    # via tox
 pytest==6.2.5
     # via
     #   -r dev-requirements.in
@@ -78,11 +81,6 @@ requests==2.31.0
     # via sphinx
 setuptools-scm==6.3.2
     # via -r dev-requirements.in
-six==1.16.0
-    # via
-    #   -c requirements.txt
-    #   tox
-    #   virtualenv
 snowballstemmer==2.1.0
     # via sphinx
 sphinx==4.2.0
@@ -105,14 +103,16 @@ toml==0.10.2
     # via
     #   coverage
     #   pytest
+tomli==2.0.1
+    # via
+    #   pyproject-api
+    #   setuptools-scm
     #   tox
-tomli==1.2.1
-    # via setuptools-scm
-tox==3.24.5
+tox==4.15.1
     # via -r dev-requirements.in
 urllib3==1.26.18
     # via requests
-virtualenv==20.8.0
+virtualenv==20.26.3
     # via tox
 wheel==0.37.1
     # via -r dev-requirements.in