diff --git a/requirements.txt b/requirements.txt
index e38a01f..9668a3c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,41 +4,72 @@
 #
 #    pip-compile --output-file=requirements.txt requirements.in
 #
-appdirs==1.4.4            # via virtualenv
-attrs==19.3.0             # via pytest
-cfgv==3.1.0               # via pre-commit
-coverage==5.2             # via pytest-cov
-defopt==6.0               # via -r requirements.in
-distlib==0.3.1            # via virtualenv
-docutils==0.16            # via defopt
-filelock==3.0.12          # via virtualenv
-flake8==3.8.3             # via -r requirements.in
-identify==1.4.21          # via pre-commit
-importlib-metadata==1.7.0  # via flake8, pluggy, pre-commit, pytest, virtualenv
-importlib-resources==3.0.0  # via pre-commit, virtualenv
-isort==5.0.4              # via -r requirements.in
-mccabe==0.6.1             # via flake8
-mock==4.0.2               # via -r requirements.in
-more-itertools==8.4.0     # via pytest
-mypy-extensions==0.4.3    # via typing-inspect
-nodeenv==1.4.0            # via pre-commit
-packaging==20.4           # via pytest
-pluggy==0.13.1            # via pytest
-pockets==0.9.1            # via sphinxcontrib-napoleon
-pre-commit==2.6.0         # via -r requirements.in
-py==1.9.0                 # via pytest
-pycodestyle==2.6.0        # via flake8
-pyflakes==2.2.0           # via flake8
-pyparsing==2.4.7          # via packaging
-pysam==0.16.0.1           # via -r requirements.in
-pytest-cov==2.10.0        # via -r requirements.in
-pytest==5.4.3             # via -r requirements.in, pytest-cov
-pyyaml==5.3.1             # via pre-commit
-six==1.15.0               # via packaging, sphinxcontrib-napoleon, virtualenv
-sphinxcontrib-napoleon==0.7  # via defopt
-toml==0.10.1              # via pre-commit
-typing-extensions==3.7.4.2  # via defopt, typing-inspect
-typing-inspect==0.6.0     # via defopt
-virtualenv==20.0.26       # via pre-commit
-wcwidth==0.2.5            # via pytest
-zipp==3.1.0               # via importlib-metadata, importlib-resources
+appdirs==1.4.4
+    # via virtualenv
+attrs==19.3.0
+    # via pytest
+cfgv==3.1.0
+    # via pre-commit
+coverage==5.2
+    # via pytest-cov
+defopt==6.0
+    # via -r requirements.in
+distlib==0.3.1
+    # via virtualenv
+docutils==0.16
+    # via defopt
+filelock==3.0.12
+    # via virtualenv
+flake8==3.8.3
+    # via -r requirements.in
+identify==1.4.21
+    # via pre-commit
+isort==5.0.4
+    # via -r requirements.in
+mccabe==0.6.1
+    # via flake8
+mock==4.0.2
+    # via -r requirements.in
+more-itertools==8.4.0
+    # via pytest
+nodeenv==1.4.0
+    # via pre-commit
+packaging==20.4
+    # via pytest
+pluggy==0.13.1
+    # via pytest
+pockets==0.9.1
+    # via sphinxcontrib-napoleon
+pre-commit==2.6.0
+    # via -r requirements.in
+py==1.10.0
+    # via pytest
+pycodestyle==2.6.0
+    # via flake8
+pyflakes==2.2.0
+    # via flake8
+pyparsing==2.4.7
+    # via packaging
+pysam==0.16.0.1
+    # via -r requirements.in
+pytest-cov==2.10.0
+    # via -r requirements.in
+pytest==5.4.3
+    # via
+    #   -r requirements.in
+    #   pytest-cov
+pyyaml==5.3.1
+    # via pre-commit
+six==1.15.0
+    # via
+    #   packaging
+    #   sphinxcontrib-napoleon
+    #   virtualenv
+sphinxcontrib-napoleon==0.7
+    # via defopt
+toml==0.10.1
+    # via pre-commit
+virtualenv==20.0.26
+    # via pre-commit
+wcwidth==0.2.5
+    # via pytest