diff --git a/requirements.txt b/requirements.txt
index 75376ea..327d20c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-sphinx==2.3.1
+sphinx==3.3.1
 sphinx-gitstamp==0.3.0
 sphinx-notfound-page==0.4
 sphinxcontrib-websupport==1.1.2
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 9370d82..28f15f9 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,4 +1,4 @@
-sphinx==2.3.1
+sphinx==3.3.1
 sphinx-gitstamp==0.3.0
 sphinx-notfound-page==0.4
 sphinxcontrib-websupport==1.1.2