diff --git a/sled/src/main.rs b/sled/src/main.rs
index 198b3d3..ec457cb 100644
--- a/sled/src/main.rs
+++ b/sled/src/main.rs
@@ -1,3 +1,4 @@
+// http://sled.rs/
 fn main() -> Result<(), Box<dyn std::error::Error>>{
     let path = "a.file";
     let tree = sled::open(path)?;