diff --git a/Cargo.toml b/Cargo.toml
index 0edf092..9d1ee10 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 authors = ["ImJeremyHe<yiliang.he@qq.com>"]
 edition = "2018"
 name = "gents"
-version = "1.3.0"
+version = "1.3.1"
 license = "MIT"
 description = "generate TypeScript interfaces from Rust code"
 repository = "https://github.com/ImJeremyHe/gents"
diff --git a/derives/Cargo.toml b/derives/Cargo.toml
index 1d15f71..cc6686a 100644
--- a/derives/Cargo.toml
+++ b/derives/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "gents_derives"
-version = "1.3.0"
+version = "1.3.1"
 description = "provides some macros for gents"
 authors = ["ImJeremyHe<yiliang.he@qq.com>"]
 license = "MIT"
diff --git a/src/descriptor.rs b/src/descriptor.rs
index 423f3ff..4146ca2 100644
--- a/src/descriptor.rs
+++ b/src/descriptor.rs
@@ -456,6 +456,20 @@ impl_builtin!(f64, "number", "f64");
 impl_builtin!(String, "string", "string");
 impl_builtin!(bool, "boolean", "bool");
 
+impl TS for () {
+    fn _register(manager: &mut DescriptorManager, _generic_base: bool) -> usize {
+        let type_id = TypeId::of::<()>();
+        let descriptor = BuiltinTypeDescriptor {
+            ts_name: "void".to_string(),
+        };
+        manager.registry(type_id, Descriptor::BuiltinType(descriptor))
+    }
+
+    fn _ts_name() -> String {
+        "void".to_string()
+    }
+}
+
 impl<T: TS + 'static> TS for Vec<T> {
     fn _register(manager: &mut DescriptorManager, generic_base: bool) -> usize {
         let idx = T::_register(manager, generic_base);