diff --git a/doc/requirements.txt b/doc/requirements.txt
index b13935d..0456f14 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,3 +1,3 @@
 # Documentation
-sphinx>=2.0.1
+sphinx>2.1.0
 sphinx_rtd_theme==0.4.3
diff --git a/tox.ini b/tox.ini
index dea76a7..8669f2f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -35,7 +35,9 @@ commands =
   yapf -dr {toxinidir}/spyglass_plugin_xls {toxinidir}/setup.py {toxinidir}/tests
   flake8 {toxinidir}/spyglass_plugin_xls {toxinidir}/tests
   bandit -r spyglass_plugin_xls -n 5
-  safety check -r requirements.txt --bare
+  safety check -r {toxinidir}/requirements.txt \
+               -r {toxinidir}/test-requirements.txt \
+               -r {toxinidir}/doc/requirements.txt --bare
 whitelist_externals =
   bash
 
@@ -45,6 +47,7 @@ deps =
 commands =
     safety check -r {toxinidir}/requirements.txt --full-report
     safety check -r {toxinidir}/test-requirements.txt --full-report
+    safety check -r {toxinidir}/doc/requirements.txt --full-report
 
 [testenv:bandit]
 deps =