diff --git a/src/pb_data_source.rs b/src/pb_data_source.rs
index 1e2d03e..a7b124e 100644
--- a/src/pb_data_source.rs
+++ b/src/pb_data_source.rs
@@ -79,10 +79,10 @@ impl DataSource for PBDataSource {
                 let mut build = &build[build.find("'items'").unwrap()..];
                 while build.contains("items") {
                     let pos = build.find("data-id=").unwrap();
-                    build = &build[pos + 10..];
+                    build = &build[pos + 9..];
                     let end = build.find('"').unwrap();
                     items.push(&build[..end]);
-                    build = &build[end + 20..];
+                    build = &build[end + 18..];
                 }
 
                 blocks.push(self.make_item_set(items, name.to_string()));