diff --git a/Cargo.lock b/Cargo.lock
index 642fa33..9d1fbdf 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,13 +4,13 @@ version = 4
 
 [[package]]
 name = "aes"
-version = "0.9.0-rc.4"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04097e08a47d9ad181c2e1f4a5fabc9ae06ce8839a333ba9a949bcb0d31fd2a3"
+checksum = "66bd29a732b644c0431c6140f370d097879203d79b80c94a6747ba0872adaef8"
 dependencies = [
  "cipher",
  "cpubits",
- "cpufeatures 0.2.17",
+ "cpufeatures",
  "zeroize",
 ]
 
@@ -87,7 +87,7 @@ checksum = "7af50940b73bf4e16c15c448a2b121c63f2d68e3e54b6a8731673cb4aa0cdff5"
 dependencies = [
  "base64ct",
  "blake2",
- "cpufeatures 0.3.0",
+ "cpufeatures",
  "password-hash",
  "zeroize",
 ]
@@ -210,7 +210,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6f8d983286843e49675a4b7a2d174efe136dc93a18d69130dd18198a6c167601"
 dependencies = [
  "cfg-if",
- "cpufeatures 0.3.0",
+ "cpufeatures",
  "rand_core 0.10.1",
 ]
 
@@ -352,15 +352,6 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "15b85f9c39137c3a891689859392b1bd49812121d0d61c9caf00d46ed5ce06ae"
 
-[[package]]
-name = "cpufeatures"
-version = "0.2.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "cpufeatures"
 version = "0.3.0"
@@ -381,9 +372,9 @@ dependencies = [
 
 [[package]]
 name = "ctr"
-version = "0.10.0-rc.4"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fee683dd898fbd052617b4514bc31f98bc32081a83b69ec46adef3b1ef4ae36f"
+checksum = "17469f8eb9bdbfad10f71f4cfddfd38b01143520c0e717d8796ccb4d44d44e42"
 dependencies = [
  "cipher",
 ]
@@ -1055,7 +1046,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e24a010dd405bd7ed803e5253182815b41bf2e6a80cc3bfc066658e03a198aa"
 dependencies = [
  "cfg-if",
- "cpufeatures 0.3.0",
+ "cpufeatures",
 ]
 
 [[package]]
@@ -1721,9 +1712,9 @@ dependencies = [
 
 [[package]]
 name = "ssec-core"
-version = "0.8.1"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "850207f1b3fb14e2719c2a91c7758db11e77cd2bcea0c42ebaed091a6abc40dd"
+checksum = "713aa9aae93ae79f9acc0549dca3c3f77b344b19aad92c7e5c54cc744f246c68"
 dependencies = [
  "aes",
  "argon2",
diff --git a/Cargo.toml b/Cargo.toml
index 1f63396..63e1d66 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -49,7 +49,7 @@ version = "0.18"
 features = [ "tokio" ]
 
 [dependencies]
-ssec-core = "0.8"
+ssec-core = "0.9"
 futures-util = "0.3"
 zeroize = "1.8"
 rpassword = "7.5"
diff --git a/src/chaff.rs b/src/chaff.rs
index 29c7cee..d11b6cf 100644
--- a/src/chaff.rs
+++ b/src/chaff.rs
@@ -4,7 +4,7 @@ use rand::{TryRng, SeedableRng};
 use rand::rngs::SysRng;
 use tokio::io::AsyncWriteExt;
 use futures_util::StreamExt;
-use ssec_core::ChaffStream;
+use ssec_core::{ChaffStream, ChaffStreamArgs};
 use std::str::FromStr;
 use crate::cli::{Cli, ChaffArgs};
 
@@ -90,7 +90,9 @@ pub async fn chaff(args: ChaffArgs) -> Result<(), ()> {
 			eprintln!("failed to open specified outout file {:?}: {e}", args.out_file);
 		}).map(|f| tokio::io::BufWriter::with_capacity(f.max_buf_size(), f))?;
 
-	let mut chaff = ChaffStream::new(rand::rngs::StdRng::try_from_rng(&mut SysRng).unwrap(), size as usize, 8 * 1024).unwrap();
+	let mut args = ChaffStreamArgs::with_length(size as usize);
+	args.set_chunk_size(8 * 1024).unwrap();
+	let mut chaff = ChaffStream::new(args, rand::rngs::StdRng::try_from_rng(&mut SysRng).unwrap());
 
 	while let Some(bytes) = chaff.next().await {
 		let b = bytes.unwrap();
diff --git a/src/dec.rs b/src/dec.rs
index 0298bbc..10bc766 100644
--- a/src/dec.rs
+++ b/src/dec.rs
@@ -1,4 +1,4 @@
-use ssec_core::decrypt::{Decrypt, SsecHeaderError};
+use ssec_core::decrypt::{Decrypt, DecryptArgs, SsecHeaderError};
 use futures_util::{Stream, StreamExt};
 use tokio::io::AsyncWriteExt;
 use zeroize::Zeroizing;
@@ -8,7 +8,7 @@ use crate::cli::{DecArgs, FetchArgs};
 use crate::file::new_async_tempfile;
 use crate::password::prompt_password;
 use crate::io::IoBundle;
-use crate::{DEFINITE_BAR_STYLE, INDEFINITE_BAR_STYLE};
+use crate::{DEFINITE_BAR_STYLE, INDEFINITE_BAR_STYLE, BYTES_PER_POLL};
 
 const SPINNER_STYLE: &str = "{spinner} deriving decryption key";
 
@@ -48,7 +48,9 @@ where
 
 	let (dec, f_out) = tokio::join!(
 		async {
-			let dec = Decrypt::new(stream).await?;
+			let mut args = DecryptArgs::default();
+			args.set_bytes_per_poll(BYTES_PER_POLL);
+			let dec = Decrypt::new(args, stream).await?;
 			Ok::<_, SsecHeaderError<E>>(tokio::task::spawn_blocking({
 				let progress = progress.clone();
 				move || {
diff --git a/src/enc.rs b/src/enc.rs
index 5ee339d..d702679 100644
--- a/src/enc.rs
+++ b/src/enc.rs
@@ -1,4 +1,4 @@
-use ssec_core::Encrypt;
+use ssec_core::{Encrypt, EncryptArgs};
 use futures_util::StreamExt;
 use tokio::io::AsyncWriteExt;
 use rand::rngs::SysRng;
@@ -6,7 +6,7 @@ use indicatif::{ProgressBar, ProgressStyle};
 use crate::cli::EncArgs;
 use crate::password::prompt_password;
 use crate::io::IoBundle;
-use crate::DEFINITE_BAR_STYLE;
+use crate::{DEFINITE_BAR_STYLE, BYTES_PER_POLL};
 
 const SPINNER_STYLE: &str = "{spinner} deriving encryption key";
 
@@ -48,7 +48,9 @@ pub async fn enc<B: IoBundle>(args: EncArgs, io: B) -> Result<(), ()> {
 		spinner.set_style(ProgressStyle::with_template(SPINNER_STYLE).unwrap());
 		spinner.enable_steady_tick(std::time::Duration::from_millis(100));
 
-		Encrypt::new_uncompressed(s, &password, &mut SysRng)
+		let mut args = EncryptArgs::default();
+		args.set_bytes_per_poll(BYTES_PER_POLL);
+		Encrypt::new(args, &mut SysRng, &password, s)
 	}).await.unwrap().unwrap();
 
 	let mut f_out = match args.out_file {
diff --git a/src/lib.rs b/src/lib.rs
index 86a5a1e..cac51b3 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,6 +15,8 @@ mod tests;
 const DEFINITE_BAR_STYLE: &str = "[{elapsed_precise}] {binary_bytes_per_sec} {bar} {binary_bytes}/{binary_total_bytes} ({eta})";
 const INDEFINITE_BAR_STYLE: &str = "[{elapsed_precise}] {binary_bytes_per_sec} ({eta})";
 
+const BYTES_PER_POLL: core::num::NonZeroUsize = core::num::NonZeroUsize::new(2048).unwrap();
+
 #[inline]
 fn handle_err(result: Result<(), ()>) -> std::process::ExitCode {
 	match result {