diff --git a/requirements.txt b/requirements.txt
index cd98b81..919389f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,36 +4,73 @@
 #
 #    pip-compile requirements.in
 #
-alabaster==0.7.12         # via sphinx
-atomicwrites==1.3.0       # via pytest
-attrs==19.1.0             # via pytest
-babel==2.6.0              # via sphinx
-certifi==2019.3.9         # via requests
-chardet==3.0.4            # via requests
-docutils==0.14            # via sphinx
-idna==2.8                 # via requests
-imagesize==1.1.0          # via sphinx
-jinja2==2.10.1            # via sphinx
-markupsafe==1.1.1         # via jinja2
-more-itertools==7.0.0     # via pytest
-packaging==19.0           # via sphinx
-pluggy==0.11.0            # via pytest
-py==1.8.0                 # via pytest
-pygments==2.4.0           # via sphinx
-pyparsing==2.4.0          # via packaging
+alabaster==0.7.12
+    # via sphinx
+atomicwrites==1.3.0
+    # via pytest
+attrs==19.1.0
+    # via pytest
+babel==2.6.0
+    # via sphinx
+certifi==2019.3.9
+    # via requests
+chardet==3.0.4
+    # via requests
+docutils==0.14
+    # via sphinx
+idna==2.8
+    # via requests
+imagesize==1.1.0
+    # via sphinx
+jinja2==2.10.1
+    # via sphinx
+markupsafe==1.1.1
+    # via jinja2
+more-itertools==7.0.0
+    # via pytest
+packaging==19.0
+    # via sphinx
+pluggy==0.11.0
+    # via pytest
+py==1.10.0
+    # via pytest
+pygments==2.4.0
+    # via sphinx
+pyparsing==2.4.0
+    # via packaging
 pytest-asyncio==0.10.0
+    # via -r requirements.in
 pytest==4.5.0
-pytz==2019.1              # via babel
-requests==2.21.0          # via sphinx
-six==1.12.0               # via packaging, pytest
-snowballstemmer==1.2.1    # via sphinx
+    # via
+    #   -r requirements.in
+    #   pytest-asyncio
+pytz==2019.1
+    # via babel
+requests==2.21.0
+    # via sphinx
+six==1.12.0
+    # via
+    #   packaging
+    #   pytest
+snowballstemmer==1.2.1
+    # via sphinx
 sphinx==2.0.1
-sphinxcontrib-applehelp==1.0.1  # via sphinx
-sphinxcontrib-devhelp==1.0.1  # via sphinx
-sphinxcontrib-htmlhelp==1.0.2  # via sphinx
-sphinxcontrib-jsmath==1.0.1  # via sphinx
-sphinxcontrib-qthelp==1.0.2  # via sphinx
-sphinxcontrib-serializinghtml==1.1.3  # via sphinx
-urllib3==1.24.3           # via requests
+    # via -r requirements.in
+sphinxcontrib-applehelp==1.0.1
+    # via sphinx
+sphinxcontrib-devhelp==1.0.1
+    # via sphinx
+sphinxcontrib-htmlhelp==1.0.2
+    # via sphinx
+sphinxcontrib-jsmath==1.0.1
+    # via sphinx
+sphinxcontrib-qthelp==1.0.2
+    # via sphinx
+sphinxcontrib-serializinghtml==1.1.3
+    # via sphinx
+urllib3==1.24.3
+    # via requests
 uvloop==0.12.2
-wcwidth==0.1.7            # via pytest
+    # via -r requirements.in
+wcwidth==0.1.7
+    # via pytest