diff --git a/Cargo.toml b/Cargo.toml
index 9403f16b..c79312ad 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -122,7 +122,8 @@ codegen-units = 4
 # wasm32-unknown-unknown always aborts on panic, so panic = "abort" changes nothing there.
 [profile.web-release]
 inherits = "release"
-opt-level = "s"
+# "z", not "s": 1.9 MB smaller (24.0 MiB -> 22.2 MiB after wasm-opt, 0.11.1), back under the gate.
+opt-level = "z"
 lto = "fat"
 codegen-units = 1
 debug = false