diff --git a/src/mp4box/vmhd.rs b/src/mp4box/vmhd.rs
index 31f24b2..c7ec8e3 100644
--- a/src/mp4box/vmhd.rs
+++ b/src/mp4box/vmhd.rs
@@ -4,7 +4,7 @@ use std::io::{Read, Seek, Write};
 
 use crate::mp4box::*;
 
-#[derive(Debug, Clone, PartialEq, Eq, Default, Serialize)]
+#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
 pub struct VmhdBox {
     pub version: u8,
     pub flags: u32,
@@ -29,6 +29,17 @@ impl VmhdBox {
     }
 }
 
+impl Default for VmhdBox {
+    fn default() -> Self {
+        Self {
+            version: 0,
+            flags: 1,
+            graphics_mode: 0,
+            op_color: RgbColor::default(),
+        }
+    }
+}
+
 impl Mp4Box for VmhdBox {
     fn box_type(&self) -> BoxType {
         self.get_type()