diff --git a/client/build.sh b/client/build.sh
old mode 100644
new mode 100755
index 7caf25b..e1b1ff4
--- a/client/build.sh
+++ b/client/build.sh
@@ -1,7 +1,10 @@
-set -e
+#!/usr/bin/env bash
+set -euo pipefail
+shopt -s inherit_errexit
+
 rm -rf out/ || true
 mkdir out/
-cargo build --target wasm32-unknown-unknown -r
+cargo build --target wasm32-unknown-unknown --release
 wasm-bindgen --weak-refs --no-typescript --target no-modules --out-dir out/ ../target/wasm32-unknown-unknown/release/wstcp_client.wasm
 cp -r src/web/* out/
 (cd out; python3 -m http.server)