diff --git a/Cargo.toml b/Cargo.toml
index 6a0f3dd..c1b10a2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "jsonmap"
-version = "0.1.1"
+version = "0.1.2"
 edition = "2018"
 license = "GPL-3.0-or-later"
 authors = ["wandercn<wander@email.cn>"]
diff --git a/src/map.rs b/src/map.rs
index 164f956..8f26749 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -95,6 +95,17 @@ where
     }
 }
 
+impl<K> Default for JsonMap<K>
+where
+    K: Eq + Clone + Hash,
+{
+    fn default() -> Self {
+        Self {
+            inner: HashMap::new(),
+        }
+    }
+}
+
 impl<K> FromIterator<(K, JsonV<K>)> for JsonMap<K>
 where
     K: Eq + Clone + Hash,