diff --git a/js/.cargo/config.toml b/js/.cargo/config.toml
new file mode 100644
index 000000000..ecdd15660
--- /dev/null
+++ b/js/.cargo/config.toml
@@ -0,0 +1,13 @@
+[target.wasm32-unknown-unknown]
+rustflags = [
+    "-C",
+    "target-feature=+atomics,+bulk-memory,+mutable-globals",
+    "-C",
+    "link-arg=--max-memory=4294967296",
+]
+
+[unstable]
+build-std = ["panic_abort", "std"]
+
+[build]
+target = "wasm32-unknown-unknown"