diff --git a/cli/src/main.rs b/cli/src/main.rs
index f8c8cc1..55d9ed4 100644
--- a/cli/src/main.rs
+++ b/cli/src/main.rs
@@ -152,8 +152,7 @@ async fn main() {
             }
             timings.drain(..=(warmup as usize));
             let avg = (timings.iter().sum::<Duration>() / n).as_nanos();
-            let deviation = (avg - timings.iter().min().unwrap().as_nanos())
-                .max(timings.iter().max().unwrap().as_nanos() - avg);
+            let deviation = (((timings.iter().max().unwrap().as_nanos() - timings.iter().min().unwrap().as_nanos()).pow(2) / 16) as f64).sqrt() as u128;
 
             let (avg, avg_units) = if avg >= 1000000000 {
                 (avg as f64 / 1000000000.0, "s")