diff --git a/Cargo.toml b/Cargo.toml
index 5d8526a..71e6e0a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,12 +1,17 @@
 [package]
 name = "markov"
-version = "0.3.0"
+version = "0.3.1"
 description = "Generate string of text from Markov chain fed by stdin"
 authors = ["Avril <flanchan@cumallover.me>"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[profile.release]
+opt-level = 3
+lto = "fat"
+codegen-units = 1
+
 [dependencies]
 chain = {package = "markov", version = "1.1.0"}
 tokio = {version = "0.2", features=["full"]}