diff --git a/rtd-requirements.txt b/rtd-requirements.txt
index b2901770..63e79f4b 100644
--- a/rtd-requirements.txt
+++ b/rtd-requirements.txt
@@ -1,6 +1,6 @@
 certifi
 inflection==0.3.0
 requests==2.20.1
-urllib3==1.10.2
+urllib3==1.24.1
 six==1.9.0
 sphinx-rtd-theme==0.1.7