diff --git a/Cargo.toml b/Cargo.toml
index d33ce9a..c1185a8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,6 +20,7 @@ rand_chacha = "0.3"
 recrypt = { version = "0.14", features = ["wasm"], default-features = false }
 serde = "1"
 serde_derive = "1"
+# Must be kept in-sync with build.js and GitHub workflows
 wasm-bindgen = { version = "=0.2.104" }
 
 [profile.dev]
diff --git a/build.js b/build.js
index 6749ed7..bc907af 100755
--- a/build.js
+++ b/build.js
@@ -33,6 +33,7 @@ shell.exec("yarn");
 shell.exec("cargo clean");
 shell.exec("cargo update");
 shell.exec("cargo install wasm-pack");
+shell.exec("cargo install wasm-bindgen-cli@0.2.104"); // version must be kept in-sync with Cargo.toml
 shell.exec("yarn run compile");
 shell.exec("yarn test");
 shell.exec("PATH=~/.cargo/bin:$PATH yarn run pack");