diff --git a/Cargo.toml b/Cargo.toml
index 2336def..84e2c74 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "itunesdb"
-version = "0.1.16"
+version = "0.1.17"
 edition = "2021"
 authors = ["alterwain"]
 
diff --git a/src/xobjects.rs b/src/xobjects.rs
index a221777..bc709b9 100644
--- a/src/xobjects.rs
+++ b/src/xobjects.rs
@@ -159,9 +159,10 @@ impl XTrackItem {
         self.args.iter().find(|t| t.arg_type == id).map_or(String::new(), |t| t.val.clone())
     }
 
-    fn update_arg(&mut self, id: u32, val: String) {
+    pub fn update_arg(&mut self, id: u32, val: String) {
         self.args.retain(|t| t.arg_type != id);
         self.args.push(XArgument { arg_type: id, val});
+        self.data.number_of_strings = self.args.len() as u32;
     }
 }