diff --git a/requirements-dev.txt b/requirements-dev.txt
index d381ef9..98cd2e9 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -17,9 +17,7 @@ astroid==2.5.1
 asttokens==2.0.4
     # via flake8-aaa
 astunparse==1.6.3
-    # via
-    #   -r docs/requirements.txt
-    #   pytkdocs
+    # via -r docs/requirements.txt
 attrs==20.3.0
     # via
     #   flake8-bugbear
@@ -42,9 +40,7 @@ beautifulsoup4==4.9.3
 black==20.8b1
     # via -r requirements-dev.in
 cached-property==1.5.2
-    # via
-    #   -r docs/requirements.txt
-    #   pytkdocs
+    # via -r docs/requirements.txt
 certifi==2020.12.5
     # via
     #   -r docs/requirements.txt
@@ -165,18 +161,7 @@ idna==2.10
     #   -r docs/requirements.txt
     #   requests
 importlib-metadata==3.7.2
-    # via
-    #   -r docs/requirements.txt
-    #   flake8
-    #   flake8-comprehensions
-    #   flake8-simplify
-    #   flake8-typing-imports
-    #   markdown
-    #   pluggy
-    #   pre-commit
-    #   pytest
-    #   stevedore
-    #   virtualenv
+    # via -r docs/requirements.txt
 iniconfig==1.1.1
     # via pytest
 isort==5.7.0
@@ -297,7 +282,7 @@ pbr==5.5.1
     # via stevedore
 pep8-naming==0.11.1
     # via -r requirements-dev.in
-pip-tools==5.5.0
+pip-tools==6.0.0
     # via -r requirements-dev.in
 pluggy==0.13.1
     # via pytest
@@ -417,17 +402,13 @@ tqdm==4.59.0
     #   nltk
 typed-ast==1.4.2
     # via
-    #   astroid
     #   black
-    #   flake8-annotations
     #   mypy
 typing-extensions==3.7.4.3
     # via
     #   -r docs/requirements.txt
     #   black
-    #   importlib-metadata
     #   mypy
-    #   pytkdocs
 urllib3==1.26.3
     # via
     #   -r docs/requirements.txt