diff --git a/synth/src/main.rs b/synth/src/main.rs
index cbed8a1..982b4e7 100644
--- a/synth/src/main.rs
+++ b/synth/src/main.rs
@@ -64,7 +64,7 @@ struct Args {
     init: Init,
     #[arg(
         long,
-        default_value_t = 2u64,
+        default_value_t = 8u64,
         help = "step size for past-k in incremental solver"
     )]
     pask_k_step_size: u64,