diff --git a/requirements/base.txt b/requirements/base.txt
index 8d957d7..4896bb9 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -1,2 +1,2 @@
-sphinx
+sphinx < 2.1
 sphinx-autobuild
diff --git a/requirements/dev.in b/requirements/dev.in
index 6711ca9..b8297af 100644
--- a/requirements/dev.in
+++ b/requirements/dev.in
@@ -1,3 +1,3 @@
-sphinx
+sphinx < 2.1
 sphinx-autobuild
 -e .[dev]
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 571158d..a47c382 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -2,33 +2,41 @@
 # This file is autogenerated by pip-compile
 # To update, run:
 #
-#    pip-compile --output-file requirements/dev.txt requirements/dev.in
+#    pip-compile --output-file=requirements/dev.txt requirements/dev.in
 #
 -e .
-alabaster==0.7.11         # via sphinx
-argh==0.26.2              # via sphinx-autobuild, watchdog
-babel==2.6.0              # via sphinx
-certifi==2018.4.16        # via requests
+alabaster==0.7.12         # via sphinx
+argh==0.26.2              # via sphinx-autobuild
+babel==2.8.0              # via sphinx
+certifi==2019.11.28       # via requests
 chardet==3.0.4            # via requests
-docutils==0.14            # via sphinx
-idna==2.7                 # via requests
-imagesize==1.0.0          # via sphinx
-jinja2==2.10              # via sphinx
-livereload==2.5.2         # via sphinx-autobuild
-markupsafe==1.0           # via jinja2
-packaging==17.1           # via sphinx
+docutils==0.16            # via sphinx
+idna==2.9                 # via requests
+imagesize==1.2.0          # via sphinx
+jinja2==2.11.1            # via sphinx
+livereload==2.6.1         # via sphinx-autobuild
+markupsafe==1.1.1         # via jinja2
+packaging==20.3           # via sphinx
 pathtools==0.1.2          # via sphinx-autobuild, watchdog
 port_for==0.3.1           # via sphinx-autobuild
-pygments==2.2.0           # via sphinx
-pyparsing==2.2.0          # via packaging
-pytz==2018.5              # via babel
-pyyaml==3.13              # via sphinx-autobuild, watchdog
-requests==2.19.1          # via sphinx
-six==1.11.0               # via livereload, packaging, sphinx
-snowballstemmer==1.2.1    # via sphinx
-sphinx-autobuild==0.7.1
-sphinx==1.7.6
-sphinxcontrib-websupport==1.1.0  # via sphinx
-tornado==5.1              # via livereload, sphinx-autobuild
-urllib3==1.23             # via requests
-watchdog==0.8.3           # via sphinx-autobuild
+pygments==2.6.1           # via sphinx
+pyparsing==2.4.6          # via packaging
+pytz==2019.3              # via babel
+pyyaml==5.3.1             # via sphinx-autobuild
+requests==2.23.0          # via sphinx
+six==1.14.0               # via livereload, packaging
+snowballstemmer==2.0.0    # via sphinx
+sphinx-autobuild==0.7.1   # via -r requirements/dev.in, kytos-sphinx-theme
+sphinx==2.0.1             # via -r requirements/dev.in, kytos-sphinx-theme
+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
+tornado==6.0.4            # via livereload, sphinx-autobuild
+urllib3==1.25.8           # via requests
+watchdog==0.10.2          # via sphinx-autobuild
+
+# The following packages are considered to be unsafe in a requirements file:
+# setuptools