diff --git a/requirements-dev.txt b/requirements-dev.txt
index 3bc8a0f..a505616 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,31 +4,75 @@
 #
 #    pip-compile requirements-dev.in
 #
-appdirs==1.4.4            # via black
-attrs==19.3.0             # via flake8-bugbear, flake8-implicit-str-concat, pytest
-black==20.8b1             # via -r requirements-dev.in
-click==7.1.2              # via black
-coverage==5.2.1           # via pytest-cov
-flake8-bugbear==20.1.4    # via -r requirements-dev.in
-flake8-comprehensions==3.2.3  # via -r requirements-dev.in
-flake8-implicit-str-concat==0.1.0  # via -r requirements-dev.in
-flake8==3.8.3             # via -r requirements-dev.in, flake8-bugbear, flake8-comprehensions
-iniconfig==1.0.1          # via pytest
-mccabe==0.6.1             # via flake8
-more-itertools==8.5.0     # via pytest
-mypy-extensions==0.4.3    # via black, mypy
-mypy==0.782               # via -r requirements-dev.in
-packaging==20.4           # via pytest
-pathspec==0.8.0           # via black
-pluggy==0.13.1            # via pytest
-py==1.9.0                 # via pytest
-pycodestyle==2.6.0        # via flake8
-pyflakes==2.2.0           # via flake8
-pyparsing==2.4.7          # via packaging
-pytest-cov==2.10.1        # via -r requirements-dev.in
-pytest==6.0.1             # via -r requirements-dev.in, pytest-cov
-regex==2020.7.14          # via black
-six==1.15.0               # via packaging
-toml==0.10.1              # via black, pytest
-typed-ast==1.4.1          # via black, mypy
-typing-extensions==3.7.4.3  # via black, mypy
+appdirs==1.4.4
+    # via black
+attrs==19.3.0
+    # via
+    #   flake8-bugbear
+    #   flake8-implicit-str-concat
+    #   pytest
+black==20.8b1
+    # via -r requirements-dev.in
+click==7.1.2
+    # via black
+coverage==5.2.1
+    # via pytest-cov
+flake8-bugbear==20.1.4
+    # via -r requirements-dev.in
+flake8-comprehensions==3.2.3
+    # via -r requirements-dev.in
+flake8-implicit-str-concat==0.1.0
+    # via -r requirements-dev.in
+flake8==3.8.3
+    # via
+    #   -r requirements-dev.in
+    #   flake8-bugbear
+    #   flake8-comprehensions
+iniconfig==1.0.1
+    # via pytest
+mccabe==0.6.1
+    # via flake8
+more-itertools==8.5.0
+    # via pytest
+mypy-extensions==0.4.3
+    # via
+    #   black
+    #   mypy
+mypy==0.782
+    # via -r requirements-dev.in
+packaging==20.4
+    # via pytest
+pathspec==0.8.0
+    # via black
+pluggy==0.13.1
+    # via pytest
+py==1.10.0
+    # via pytest
+pycodestyle==2.6.0
+    # via flake8
+pyflakes==2.2.0
+    # via flake8
+pyparsing==2.4.7
+    # via packaging
+pytest-cov==2.10.1
+    # via -r requirements-dev.in
+pytest==6.0.1
+    # via
+    #   -r requirements-dev.in
+    #   pytest-cov
+regex==2020.7.14
+    # via black
+six==1.15.0
+    # via packaging
+toml==0.10.1
+    # via
+    #   black
+    #   pytest
+typed-ast==1.4.1
+    # via
+    #   black
+    #   mypy
+typing-extensions==3.7.4.3
+    # via
+    #   black
+    #   mypy