diff --git a/requirements/dev.txt b/requirements/dev.txt
index ccf396e7..928a4ff1 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -41,7 +41,7 @@ six==1.15.0               # via packaging, pip-tools, tox, virtualenv
 snowballstemmer==2.0.0    # via sphinx
 sphinx-issues==1.2.0      # via -r requirements/docs.in
 sphinx-tabs==1.3.0        # via -r requirements/docs.in
-sphinx==3.2.1             # via -r requirements/docs.in, pallets-sphinx-themes, sphinx-issues, sphinx-tabs, sphinxcontrib-log-cabinet
+sphinx==3.4.1             # via -r requirements/docs.in, pallets-sphinx-themes, sphinx-issues, sphinx-tabs, sphinxcontrib-log-cabinet
 sphinxcontrib-applehelp==1.0.2  # via sphinx
 sphinxcontrib-devhelp==1.0.2  # via sphinx
 sphinxcontrib-htmlhelp==1.0.3  # via sphinx
diff --git a/requirements/docs.txt b/requirements/docs.txt
index 045fb161..72f59a90 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -23,7 +23,7 @@ six==1.15.0               # via packaging
 snowballstemmer==2.0.0    # via sphinx
 sphinx-issues==1.2.0      # via -r requirements/docs.in
 sphinx-tabs==1.3.0        # via -r requirements/docs.in
-sphinx==3.2.1             # via -r requirements/docs.in, pallets-sphinx-themes, sphinx-issues, sphinx-tabs, sphinxcontrib-log-cabinet
+sphinx==3.4.1             # via -r requirements/docs.in, pallets-sphinx-themes, sphinx-issues, sphinx-tabs, sphinxcontrib-log-cabinet
 sphinxcontrib-applehelp==1.0.2  # via sphinx
 sphinxcontrib-devhelp==1.0.2  # via sphinx
 sphinxcontrib-htmlhelp==1.0.3  # via sphinx