diff --git a/requirements.txt b/requirements.txt
index 5215a29..f05e0f2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ hyperlink==21.0.0
     # via
     #   -r requirements.in
     #   chert
-idna==3.10
+idna==3.15
     # via hyperlink
 lithoxyl==21.0.0
     # via chert