diff --git a/crates/chaff-sim/benches/tiktok_undefended.rs b/crates/chaff-sim/benches/tiktok_undefended.rs
index dbc3960..ee74307 100644
--- a/crates/chaff-sim/benches/tiktok_undefended.rs
+++ b/crates/chaff-sim/benches/tiktok_undefended.rs
@@ -70,7 +70,7 @@ fn double(c: &mut Criterion) {
 
 criterion_group!(
     name = tiktok_undefended;
-    config = Criterion::default().sample_size(10);
+    config = Criterion::default().sample_size(20);
     targets = constant, no_op, double
 );
 criterion_main!(tiktok_undefended);
diff --git a/flake.nix b/flake.nix
index 03fb75f..7900926 100644
--- a/flake.nix
+++ b/flake.nix
@@ -76,6 +76,7 @@
           cargo-nextest
           cargo-outdated
           cargo-tarpaulin
+          gnuplot
         ];
 
         allFeatures = x: x ++ ["--all-features"];