diff --git a/Cargo.toml b/Cargo.toml
index c6d74d7..4765189 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,7 @@ edition = "2018"
 
 [dependencies]
 ansi_term = "0.12"
+bincode = "1.3.1"
 decorum = "0.3"
 dyn-clone = "1.0"
 enum_dispatch = "0.3"
diff --git a/src/render.rs b/src/render.rs
index 480f75c..18e171e 100644
--- a/src/render.rs
+++ b/src/render.rs
@@ -10,6 +10,7 @@ use plotly;
 use image::{RgbImage, Rgb};
 use imageproc::{pixelops, drawing};
 use std::fs::File;
+use std::io::BufWriter;
 use std::path::PathBuf;
 use std::sync::{Mutex, RwLock};
 use y4m;
@@ -478,8 +479,9 @@ impl SerializerRenderer {
 impl Renderer for SerializerRenderer {
     fn render(&self, state: &dyn GenericSim, measurements: &[Box<dyn AbstractMeasurement>]) {
         let snap = state.to_static();
-        let name = format!("{}{}.cbor", self.out_base, snap.step_no());
-        let out = File::create(name).unwrap();
-        serde_cbor::to_writer(out, &snap).unwrap();
+        let name = format!("{}{}.bc", self.out_base, snap.step_no());
+        let out = BufWriter::new(File::create(name).unwrap());
+        //serde_cbor::to_writer(out, &snap).unwrap();
+        bincode::serialize_into(out, &snap).unwrap();
     }
 }