diff --git a/src/lib.rs b/src/lib.rs
index 31a25ad..034fc02 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -21,7 +21,7 @@ pub mod wikipedia_infobox_analyzer {
     }
 
     /// Creates an ascii infobox out of the properties
-    pub fn format_infobox_from_used_properties(name: String, properties: Vec<String>) -> String {
+    pub fn format_infobox_from_used_properties(name: String, properties: Vec<u64>) -> String {
         let mut ascii_table = AsciiTable::default();
         ascii_table.set_max_width(26);
         ascii_table
@@ -29,7 +29,7 @@ pub mod wikipedia_infobox_analyzer {
             .set_header(name)
             .set_align(Align::Left);
 
-        let data: Vec<Vec<&String>> = properties.iter().map(|v| vec![v]).collect();
+        let data: Vec<Vec<String>> = properties.iter().map(|v| vec![format!("P{v}")]).collect();
         ascii_table.format(data)
     }
 
@@ -139,7 +139,7 @@ mod tests {
         assert_eq!(
             format_infobox_from_used_properties(
                 "Earth".to_string(),
-                vec!["P31".to_string(), "P361".to_string(), "P571".to_string()]
+                vec![31, 361, 571]
             ),
             concat![
                 "┌───────┐\n",