diff --git a/doc/.sphinx/requirements.txt b/doc/.sphinx/requirements.txt
index 9597fca5..edcc4480 100644
--- a/doc/.sphinx/requirements.txt
+++ b/doc/.sphinx/requirements.txt
@@ -28,4 +28,4 @@ requests==2.24.0
 six==1.15.0
 snowballstemmer==2.0.0
 sphinxcontrib-websupport==1.2.2
-urllib3==1.25.9
+urllib3==1.26.5