diff --git a/requirements-dev.txt b/requirements-dev.txt
index e26acb28..03f83262 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -28,7 +28,7 @@ coverage[toml]==7.8.0 ; python_version >= '3.7'
 
 cryptography==44.0.2 ; python_version >= '3.7'
 
-dill==0.3.9 ; python_version < '3.11'
+dill==0.4.0 ; python_version < '3.11'
 
 exceptiongroup==1.2.2 ; python_version < '3.11'