diff --git a/src/main.rs b/src/main.rs
index fa41f94..316a4f4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -37,5 +37,5 @@ fn main() {
             results: bsq::run(gridsize, chunksize, density, RUNS, (n, len)),
         })
         .collect::<Vec<_>>();
-    serde_json::to_writer(std::fs::File::open("./data.json").unwrap(), &res).unwrap();
+    serde_json::to_writer(std::fs::File::open(format!("./data-{}.json", chrono::Local::now().format("%s"))).unwrap(), &res).unwrap();
 }