diff --git a/docs/requirements.txt b/docs/requirements.txt
index 29d153d..9017806 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -15,7 +15,7 @@ docutils==0.20.1
     #   sphinx
     #   sphinx-rtd-theme
     #   sphinx-tabs
-idna==3.11
+idna==3.15
     # via requests
 imagesize==2.0.0
     # via sphinx