diff --git a/doc/requirements.txt b/doc/requirements.txt
index c2718b3795599f3ef95653ea6dc7f6a2241153da..b645346709067e55c8d39f3e18d6571d7da93572 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -2,4 +2,5 @@ sphinx
 sphinx_rtd_theme
 autoapi
 sphinx-autoapi
-nbsphinx
\ No newline at end of file
+nbsphinx
+urllib3<2.0.0