diff --git a/sphinx/requirements.txt b/sphinx/requirements.txt
index abad429..d1aa3ed 100644
--- a/sphinx/requirements.txt
+++ b/sphinx/requirements.txt
@@ -20,4 +20,4 @@ snowballstemmer==1.2.1
 Sphinx==1.7.7
 sphinxcontrib-websupport==1.1.0
 sphinx-markdown-tables==0.0.8
-urllib3==1.24.2
+urllib3==1.26.5