diff --git a/requirements/doc.txt b/requirements/doc.txt
index f4bbb68..0778627 100644
--- a/requirements/doc.txt
+++ b/requirements/doc.txt
@@ -4,35 +4,68 @@
 #
 #    make upgrade
 #
-alabaster==0.7.12         # via sphinx
-babel==2.8.0              # via sphinx
-certifi==2020.6.20        # via requests
-chardet==3.0.4            # via requests
-docutils==0.16            # via sphinx
-fisher==0.1.9             # via -r requirements/base.txt
-idna==2.10                # via requests
-imagesize==1.2.0          # via sphinx
-importlib-metadata==1.7.0  # via -r requirements/base.txt, path
-jinja2==2.11.2            # via sphinx
-lxml==4.5.2               # via -r requirements/base.txt
-markupsafe==1.1.1         # via jinja2
-packaging==20.4           # via sphinx
-path==13.1.0              # via -r requirements/base.txt
-pygments==2.6.1           # via sphinx
-pyparsing==2.4.7          # via packaging
-pytz==2020.1              # via -r requirements/base.txt, babel
-requests==2.24.0          # via sphinx
-six==1.15.0               # via packaging
-snowballstemmer==2.0.0    # via sphinx
-sphinx==3.1.2             # via -r requirements/doc.in
-sphinxcontrib-applehelp==1.0.2  # via sphinx
-sphinxcontrib-devhelp==1.0.2  # via sphinx
-sphinxcontrib-htmlhelp==1.0.3  # via sphinx
-sphinxcontrib-jsmath==1.0.1  # via sphinx
-sphinxcontrib-qthelp==1.0.3  # via sphinx
-sphinxcontrib-serializinghtml==1.1.4  # via sphinx
-urllib3==1.25.9           # via requests
-zipp==1.2.0               # via -r requirements/base.txt, importlib-metadata
+alabaster==0.7.12
+    # via sphinx
+babel==2.8.0
+    # via sphinx
+certifi==2020.6.20
+    # via requests
+chardet==3.0.4
+    # via requests
+docutils==0.16
+    # via sphinx
+fisher==0.1.9
+    # via -r base.txt
+idna==2.10
+    # via requests
+imagesize==1.2.0
+    # via sphinx
+importlib-metadata==1.7.0
+    # via -r base.txt
+jinja2==2.11.3
+    # via sphinx
+lxml==4.5.2
+    # via -r base.txt
+markupsafe==1.1.1
+    # via jinja2
+packaging==20.4
+    # via sphinx
+path==13.1.0
+    # via -r base.txt
+pygments==2.6.1
+    # via sphinx
+pyparsing==2.4.7
+    # via packaging
+pytz==2020.1
+    # via
+    #   -r base.txt
+    #   babel
+requests==2.24.0
+    # via sphinx
+six==1.15.0
+    # via packaging
+snowballstemmer==2.0.0
+    # via sphinx
+sphinx==3.1.2
+    # via -r doc.in
+sphinxcontrib-applehelp==1.0.2
+    # via sphinx
+sphinxcontrib-devhelp==1.0.2
+    # via sphinx
+sphinxcontrib-htmlhelp==1.0.3
+    # via sphinx
+sphinxcontrib-jsmath==1.0.1
+    # via sphinx
+sphinxcontrib-qthelp==1.0.3
+    # via sphinx
+sphinxcontrib-serializinghtml==1.1.4
+    # via sphinx
+urllib3==1.25.9
+    # via requests
+zipp==1.2.0
+    # via
+    #   -r base.txt
+    #   importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
 # setuptools