diff --git a/doc/py-requirements.txt b/doc/py-requirements.txt
index 4d98053..81cc229 100644
--- a/doc/py-requirements.txt
+++ b/doc/py-requirements.txt
@@ -22,5 +22,5 @@ PyYAML==3.12
 requests==2.18.4
 requests-ntlm==1.0.0
 six==1.10.0
-urllib3==1.22
+urllib3==1.26.5
 xmltodict==0.11.0