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Cargo.lock

@@ -39,6 +39,7 @@ dependencies = [
  "indoc",
  "scraper",
  "serde",
+ "serde-wasm-bindgen 0.6.5",
  "serde_json",
  "worker",
  "worker-macros",

Cargo.toml

@@ -22,3 +22,4 @@ indoc = "2.0.5"
 # We don't use getrandom, but we enable the "js" feature to enable
 # WebAssembly support.
 getrandom = { version = "0.2", features = ["js"] }
+serde-wasm-bindgen = "0.6.5"

src/lib.rs

@@ -64,11 +64,11 @@ async fn run_scrape(env: Env) -> Result<String> {
         let request = Request::new_with_init(
             &webhook_url,
             RequestInit::new()
-                .with_body(json!({
-                    "text": message,
-                }))
+                .with_body(Some(serde_wasm_bindgen::to_value(
+                    &json!({ "text": message }),
+                )?))
                 .with_method(Method::Post),
-        );
+        )?;
 
         Fetch::Request(request).send().await?;
     }