diff --git a/Cargo.toml b/Cargo.toml
index 8afeacd..4e811d6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,3 +6,7 @@ edition = "2021"
 [dependencies]
 argon2 = "0.5.1"
 rand_core = { version = "0.6.4", features = ["std"] }
+
+[profile.release]
+lto = true
+opt-level = 'z'
diff --git a/bin/argon2-wasi.wasm b/bin/argon2-wasi.wasm
index 697d5d1..7e6ad28 100755
Binary files a/bin/argon2-wasi.wasm and b/bin/argon2-wasi.wasm differ
diff --git a/build.sh b/build.sh
index 817d931..433910f 100755
--- a/build.sh
+++ b/build.sh
@@ -1 +1,4 @@
-cargo clean && RUST_BACKTRACE=FULL cargo build --target wasm32-wasi --release
\ No newline at end of file
+cargo clean && cargo build --target wasm32-wasi --release
+mkdir target/wasm32-wasi/optimized
+wasm-opt -Os -o target/wasm32-wasi/optimized/argon2-wasi.wasm target/wasm32-wasi/release/argon2-wasi.wasm
+cp target/wasm32-wasi/optimized/argon2-wasi.wasm ./bin/argon2-wasi.wasm