diff --git a/lib/Pipfile b/lib/Pipfile
index 115d570ab380..62220ae86825 100644
--- a/lib/Pipfile
+++ b/lib/Pipfile
@@ -18,7 +18,7 @@ testfixtures = "*"
 twine = "*"
 wheel = "*"
 # Doc builder packages:
-Sphinx = "==3.2.1"
+Sphinx = "==3.5.2"
 recommonmark = "*"
 sphinx-markdown-tables = "*"
 sphinx-rtd-theme = "*"