diff --git a/pyproject.toml b/pyproject.toml
index 30255911..99715fd9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -109,7 +109,9 @@ comics = [
     "natsort>=2.2.0,<8.5.0",
     "comicapi>=2.2.0,<3.3.0",
 ]
-kobo = ["jsonschema>=3.2.0,<4.24.0"]
+kobo = [
+    "jsonschema>=3.2.0,<4.24.0",
+]
 
 [project.scripts]
 cps = "calibreweb:main"