diff --git a/crates/cli-support/Cargo.toml b/crates/cli-support/Cargo.toml
index c46902f7..b1991869 100644
--- a/crates/cli-support/Cargo.toml
+++ b/crates/cli-support/Cargo.toml
@@ -19,5 +19,5 @@ serde_derive = "1.0"
 serde_json = "1.0"
 tempfile = "3.0"
 wasm-bindgen-shared = { path = "../shared", version = '=0.2.14' }
-wasm-gc-api = "0.1.8"
+wasm-gc-api = "0.1.9"
 wasmi = "0.3"
diff --git a/crates/cli-support/src/js/mod.rs b/crates/cli-support/src/js/mod.rs
index a4125f19..33d4391b 100644
--- a/crates/cli-support/src/js/mod.rs
+++ b/crates/cli-support/src/js/mod.rs
@@ -1580,12 +1580,14 @@ impl<'a> Context<'a> {
 
     fn gc(&mut self) -> Result<(), Error> {
         let module = mem::replace(self.module, Module::default());
-        let wasm_bytes = parity_wasm::serialize(module)?;
-        let bytes = wasm_gc::Config::new()
+        let result = wasm_gc::Config::new()
             .demangle(self.config.demangle)
             .keep_debug(self.config.keep_debug || self.config.debug)
-            .gc(&wasm_bytes)?;
-        *self.module = deserialize_buffer(&bytes)?;
+            .run(module, |m| parity_wasm::serialize(m).unwrap())?;
+        *self.module = match result.into_module() {
+            Ok(m) => m,
+            Err(result) => deserialize_buffer(&result.into_bytes()?)?,
+        };
         Ok(())
     }