diff --git a/requirements/dev.txt b/requirements/dev.txt
index 40cba86..6803613 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -4,28 +4,69 @@
 #
 #    pip-compile requirements/dev.in
 #
-appdirs==1.4.4            # via virtualenv
-attrs==19.3.0             # via pytest
-cfgv==3.1.0               # via pre-commit
-click==7.1.2              # via pip-tools
-coverage==5.3             # via -r requirements/dev.in
-distlib==0.3.0            # via virtualenv
-filelock==3.0.12          # via tox, virtualenv
-identify==1.4.19          # via pre-commit
-iniconfig==1.1.1          # via pytest
-nodeenv==1.4.0            # via pre-commit
-packaging==20.4           # via pytest, tox
-pip-tools==5.4.0          # via -r requirements/dev.in
-pluggy==0.13.1            # via pytest, tox
-pre-commit==2.9.2         # via -r requirements/dev.in
-py==1.8.2                 # via pytest, tox
-pyparsing==2.4.7          # via packaging
-pytest==6.1.2             # via -r requirements/tests.in
-pyyaml==5.3.1             # via pre-commit
-six==1.15.0               # via packaging, pip-tools, tox, virtualenv
-toml==0.10.1              # via pre-commit, pytest, tox
-tox==3.20.1               # via -r requirements/dev.in
-virtualenv==20.0.23       # via pre-commit, tox
+appdirs==1.4.4
+    # via virtualenv
+attrs==19.3.0
+    # via pytest
+cfgv==3.1.0
+    # via pre-commit
+click==7.1.2
+    # via pip-tools
+coverage==5.3
+    # via -r requirements/dev.in
+distlib==0.3.0
+    # via virtualenv
+filelock==3.0.12
+    # via
+    #   tox
+    #   virtualenv
+identify==1.4.19
+    # via pre-commit
+iniconfig==1.1.1
+    # via pytest
+nodeenv==1.4.0
+    # via pre-commit
+packaging==20.4
+    # via
+    #   pytest
+    #   tox
+pep517==0.10.0
+    # via pip-tools
+pip-tools==6.0.1
+    # via -r requirements/dev.in
+pluggy==0.13.1
+    # via
+    #   pytest
+    #   tox
+pre-commit==2.9.2
+    # via -r requirements/dev.in
+py==1.8.2
+    # via
+    #   pytest
+    #   tox
+pyparsing==2.4.7
+    # via packaging
+pytest==6.1.2
+    # via -r requirements/tests.in
+pyyaml==5.3.1
+    # via pre-commit
+six==1.15.0
+    # via
+    #   packaging
+    #   tox
+    #   virtualenv
+toml==0.10.1
+    # via
+    #   pep517
+    #   pre-commit
+    #   pytest
+    #   tox
+tox==3.20.1
+    # via -r requirements/dev.in
+virtualenv==20.0.23
+    # via
+    #   pre-commit
+    #   tox
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip