diff --git a/docs/requirements.txt b/docs/requirements.txt
index d71568c..10e6eec 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -4,23 +4,47 @@
 #
 #    pip-compile --output-file docs/requirements.txt docs/requirements.in
 #
-alabaster==0.7.12         # via sphinx
-babel==2.6.0              # via sphinx
-certifi==2018.10.15       # via requests
-chardet==3.0.4            # via requests
-docutils==0.14            # via sphinx
-idna==2.7                 # via requests
-imagesize==1.1.0          # via sphinx
-jinja2==2.10.1
-markupsafe==1.0           # via jinja2
-packaging==18.0           # via sphinx
-pygments==2.2.0           # via sphinx
-pyparsing==2.3.0          # via packaging
-pytz==2018.7              # via babel
-requests==2.20.0          # via sphinx
-six==1.11.0               # via packaging, sphinx
-snowballstemmer==1.2.1    # via sphinx
+alabaster==0.7.12
+    # via sphinx
+babel==2.6.0
+    # via sphinx
+certifi==2018.10.15
+    # via requests
+chardet==3.0.4
+    # via requests
+docutils==0.14
+    # via sphinx
+idna==2.7
+    # via requests
+imagesize==1.1.0
+    # via sphinx
+jinja2==2.11.3
+    # via
+    #   -r requirements.in
+    #   sphinx
+markupsafe==1.0
+    # via jinja2
+packaging==18.0
+    # via sphinx
+pygments==2.2.0
+    # via sphinx
+pyparsing==2.3.0
+    # via packaging
+pytz==2018.7
+    # via babel
+requests==2.20.0
+    # via sphinx
+six==1.11.0
+    # via
+    #   packaging
+    #   sphinx
+snowballstemmer==1.2.1
+    # via sphinx
 sphinx==1.8.1
-sphinxcontrib-websupport==1.1.0  # via sphinx
-typing==3.6.6             # via sphinx
-urllib3==1.24.1           # via requests
+    # via -r requirements.in
+sphinxcontrib-websupport==1.1.0
+    # via sphinx
+typing==3.6.6
+    # via sphinx
+urllib3==1.24.1
+    # via requests