diff --git a/requirements-dev.txt b/requirements-dev.txt
index 57e5a5d..37dad6d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -22,7 +22,7 @@ flit==3.9.0
 
 flit-core==3.9.0 ; python_version >= '3.6'
 
-idna==3.7 ; python_version >= '3.5'
+idna==3.8 ; python_version >= '3.5'
 
 importlib-metadata==6.8.0 ; python_version >= '3.7'