diff --git a/dev-requirements.txt b/dev-requirements.txt
index 04b6e2e..afbbe72 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -4,50 +4,96 @@
 #
 #    pip-compile dev-requirements.in
 #
---index-url https://mirrors.aliyun.com/pypi/simple
---trusted-host mirrors.aliyun.com
-
-attrs==19.3.0             # via hypothesis, pytest
-bleach==3.1.4             # via readme-renderer
-certifi==2019.11.28       # via requests
-cffi==1.14.0              # via cryptography
-chardet==3.0.4            # via requests
-coverage==5.1             # via pytest-cov
-cryptography==2.8         # via secretstorage
-docutils==0.16            # via readme-renderer
-entrypoints==0.3          # via flake8
-flake8==3.7.9             # via -r dev-requirements.in
-hypothesis==5.8.0         # via -r dev-requirements.in
-idna==2.9                 # via requests
-importlib-metadata==1.6.0  # via keyring, pluggy, pytest, twine
-jeepney==0.4.3            # via keyring, secretstorage
-keyring==21.2.0           # via twine
-mccabe==0.6.1             # via flake8
-more-itertools==8.2.0     # via pytest
-packaging==20.3           # via pytest
-pkginfo==1.5.0.1          # via twine
-pluggy==0.13.1            # via pytest
-py==1.8.1                 # via pytest
-pycodestyle==2.5.0        # via flake8
-pycparser==2.20           # via cffi
-pyflakes==2.1.1           # via flake8
-pygments==2.6.1           # via readme-renderer
-pyparsing==2.4.6          # via packaging
-pytest-cov==2.8.1         # via -r dev-requirements.in
-pytest==5.4.1             # via -r dev-requirements.in, pytest-cov
-readme-renderer==25.0     # via twine
-requests-toolbelt==0.9.1  # via twine
-requests==2.23.0          # via requests-toolbelt, twine
-secretstorage==3.1.2      # via keyring
-six==1.14.0               # via bleach, cryptography, packaging, readme-renderer
-sortedcontainers==2.1.0   # via hypothesis
-tqdm==4.44.1              # via twine
-twine==3.1.1              # via -r dev-requirements.in
-urllib3==1.25.8           # via requests
-wcwidth==0.1.9            # via pytest
-webencodings==0.5.1       # via bleach
-wheel==0.34.2             # via -r dev-requirements.in
-zipp==3.1.0               # via importlib-metadata
+attrs==19.3.0
+    # via
+    #   hypothesis
+    #   pytest
+bleach==3.1.4
+    # via readme-renderer
+certifi==2019.11.28
+    # via requests
+cffi==1.14.0
+    # via cryptography
+chardet==3.0.4
+    # via requests
+coverage==5.1
+    # via pytest-cov
+cryptography==2.8
+    # via secretstorage
+docutils==0.16
+    # via readme-renderer
+entrypoints==0.3
+    # via flake8
+flake8==3.7.9
+    # via -r dev-requirements.in
+hypothesis==5.8.0
+    # via -r dev-requirements.in
+idna==2.9
+    # via requests
+jeepney==0.4.3
+    # via
+    #   keyring
+    #   secretstorage
+keyring==21.2.0
+    # via twine
+mccabe==0.6.1
+    # via flake8
+more-itertools==8.2.0
+    # via pytest
+packaging==20.3
+    # via pytest
+pkginfo==1.5.0.1
+    # via twine
+pluggy==0.13.1
+    # via pytest
+py==1.8.1
+    # via pytest
+pycodestyle==2.5.0
+    # via flake8
+pycparser==2.20
+    # via cffi
+pyflakes==2.1.1
+    # via flake8
+pygments==2.7.4
+    # via readme-renderer
+pyparsing==2.4.6
+    # via packaging
+pytest-cov==2.8.1
+    # via -r dev-requirements.in
+pytest==5.4.1
+    # via
+    #   -r dev-requirements.in
+    #   pytest-cov
+readme-renderer==25.0
+    # via twine
+requests-toolbelt==0.9.1
+    # via twine
+requests==2.23.0
+    # via
+    #   requests-toolbelt
+    #   twine
+secretstorage==3.1.2
+    # via keyring
+six==1.14.0
+    # via
+    #   bleach
+    #   cryptography
+    #   packaging
+    #   readme-renderer
+sortedcontainers==2.1.0
+    # via hypothesis
+tqdm==4.44.1
+    # via twine
+twine==3.1.1
+    # via -r dev-requirements.in
+urllib3==1.25.8
+    # via requests
+wcwidth==0.1.9
+    # via pytest
+webencodings==0.5.1
+    # via bleach
+wheel==0.34.2
+    # via -r dev-requirements.in
 
 # The following packages are considered to be unsafe in a requirements file:
 # setuptools