diff --git a/docs-rtd/requirements.txt b/docs-rtd/requirements.txt
index cbb135436..6b9fec13d 100644
--- a/docs-rtd/requirements.txt
+++ b/docs-rtd/requirements.txt
@@ -23,7 +23,7 @@ docutils==0.19
     #   -r requirements.in
     #   pydata-sphinx-theme
     #   sphinx
-idna==3.10
+idna==3.15
     # via requests
 imagesize==1.4.1
     # via sphinx