diff --git a/examples/wasm/.cargo/config.toml b/examples/wasm/.cargo/config.toml
new file mode 100644
index 0000000..8467175
--- /dev/null
+++ b/examples/wasm/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+rustflags = ["--cfg=web_sys_unstable_apis"]