diff --git a/Cargo.toml b/Cargo.toml
index f32ff54..f2d2177 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,5 +11,5 @@ jack = "0.8"
 rosc = "~0.5"
 structopt = "0.3"
 parking_lot = "0.11"
-packed_simd = { version = "0.3.6", package = "packed_simd_2" }
+packed_simd = { version = "0.3.8", package = "packed_simd_2" }
 tokio = { version = "1", features = ["full"] }
diff --git a/README.md b/README.md
index 3b55811..2daea83 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 # About
-Stereo 3-band parametric equalizer for jack with fader and mono controls.
+Stereo 3-band parametric equalizer for jack with fader and mono controls. This
+package requires rust's nightly toolchain to build.
 
 # Usage
 Estripe runs an OSC server at port 5510, and can receive messages at the