diff --git a/pyproject.toml b/pyproject.toml
index ec12643..82ba05b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "black==22.6",
+    "black==26.3.1",
     "build",
     "snakefmt",
 ]