diff --git a/crates/ruff/src/rules/isort/settings.rs b/crates/ruff/src/rules/isort/settings.rs
index dba9034846..020d7c90bf 100644
--- a/crates/ruff/src/rules/isort/settings.rs
+++ b/crates/ruff/src/rules/isort/settings.rs
@@ -255,7 +255,7 @@ pub struct Options {
     pub lines_between_types: Option<usize>,
     #[option(
         default = r#"[]"#,
-        value_type = "Vec<String>",
+        value_type = "list[str]",
         example = r#"
             forced-separate = ["tests"]
         "#