diff --git a/requirements-dev.txt b/requirements-dev.txt
index c4e481f..967f3c4 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -10,8 +10,6 @@ apeye==1.1.0
     # via sphinx-toolbox
 appdirs==1.4.4
     # via apeye
-atomicwrites==1.4.0
-    # via pytest
 attrs==21.4.0
     # via pytest
 autodocsumm==0.2.7
@@ -37,12 +35,7 @@ click==8.0.3
     #   black
     #   consolekit
 colorama==0.4.4
-    # via
-    #   click
-    #   consolekit
-    #   pytest
-    #   sphinx
-    #   sphinx-autobuild
+    # via sphinx-autobuild
 commonmark==0.9.1
     # via recommonmark
 consolekit==1.3.1
@@ -78,14 +71,6 @@ idna==3.3
     #   requests
 imagesize==1.3.0
     # via sphinx
-importlib-metadata==4.11.1
-    # via
-    #   -c requirements.txt
-    #   click
-    #   domdf-python-tools
-    #   pluggy
-    #   pytest
-    #   sphinx
 iniconfig==1.1.1
     # via pytest
 jinja2==3.0.3
@@ -103,9 +88,7 @@ mistletoe==0.8.1
 msgpack==1.0.3
     # via cachecontrol
 mypy-extensions==0.4.3
-    # via
-    #   black
-    #   typing-inspect
+    # via black
 natsort==8.0.2
     # via domdf-python-tools
 packaging==21.3
@@ -122,7 +105,7 @@ pluggy==1.0.0
     # via pytest
 py==1.11.0
     # via pytest
-pygments==2.10.0
+pygments==2.15.0
     # via
     #   sphinx
     #   sphinx-prompt
@@ -147,8 +130,6 @@ requests==2.27.1
     #   sphinx
 ruamel-yaml==0.17.21
     # via sphinx-toolbox
-ruamel-yaml-clib==0.2.6
-    # via ruamel.yaml
 six==1.16.0
     # via
     #   -c requirements.txt
@@ -202,26 +183,16 @@ tomli==1.2.3
     # via black
 tornado==6.1
     # via livereload
-typed-ast==1.5.1
-    # via black
 typing-extensions==4.1.1
     # via
     #   -c requirements.txt
     #   black
     #   consolekit
     #   domdf-python-tools
-    #   importlib-metadata
     #   sphinx-toolbox
-    #   typing-inspect
-typing-inspect==0.7.1
-    # via sphinx-toolbox
 urllib3==1.26.8
     # via
     #   -c requirements.txt
     #   requests
 webencodings==0.5.1
     # via html5lib
-zipp==3.7.0
-    # via
-    #   -c requirements.txt
-    #   importlib-metadata