diff --git a/requirements-dev.txt b/requirements-dev.txt
index 34261fd..5e36fd3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -10,7 +10,7 @@ colorama==0.4.6
 
 coverage[toml]==7.6.1
 
-dill==0.3.8
+dill==0.3.9
 
 docutils==0.20.1