diff --git a/src/cli/javascript/request_filter.rs b/src/cli/javascript/request_filter.rs
index 2c50d0b2a1..c40defca40 100644
--- a/src/cli/javascript/request_filter.rs
+++ b/src/cli/javascript/request_filter.rs
@@ -1,4 +1,3 @@
-use std::borrow::Cow;
 use std::sync::Arc;
 
 use hyper::body::Bytes;
@@ -53,7 +52,7 @@ impl RequestFilter {
     async fn on_request(&self, mut request: reqwest::Request) -> anyhow::Result<Response<Bytes>> {
         let js_request = WorkerRequest::try_from(&request)?;
         let event = Event::Request(js_request);
-        let command = self.worker.call(Cow::Borrowed("onRequest"), event).await?;
+        let command = self.worker.call("onRequest", event).await?;
         match command {
             Some(command) => match command {
                 Command::Request(js_request) => {
diff --git a/src/cli/javascript/runtime.rs b/src/cli/javascript/runtime.rs
index e76462279c..4f32e61dc6 100644
--- a/src/cli/javascript/runtime.rs
+++ b/src/cli/javascript/runtime.rs
@@ -1,4 +1,3 @@
-use std::borrow::Cow;
 use std::cell::{OnceCell, RefCell};
 use std::fmt::{Debug, Formatter};
 use std::thread;
@@ -83,13 +82,9 @@ impl Drop for Runtime {
 
 #[async_trait::async_trait]
 impl WorkerIO<Event, Command> for Runtime {
-    async fn call(
-        &self,
-        name: Cow<'async_trait, str>,
-        event: Event,
-    ) -> anyhow::Result<Option<Command>> {
+    async fn call(&self, name: &'async_trait str, event: Event) -> anyhow::Result<Option<Command>> {
         let script = self.script.clone();
-        let name = name.as_ref().to_string(); // TODO
+        let name = name.to_string(); // TODO
         if let Some(runtime) = &self.tokio_runtime {
             runtime
                 .spawn(async move {
@@ -107,11 +102,11 @@ impl WorkerIO<Event, Command> for Runtime {
 impl WorkerIO<ConstValue, ConstValue> for Runtime {
     async fn call(
         &self,
-        name: Cow<'async_trait, str>,
+        name: &'async_trait str,
         input: ConstValue,
     ) -> anyhow::Result<Option<ConstValue>> {
         let script = self.script.clone();
-        let name = name.as_ref().to_string();
+        let name = name.to_string();
         if let Some(runtime) = &self.tokio_runtime {
             runtime
                 .spawn(async move {
diff --git a/src/core/lambda/io.rs b/src/core/lambda/io.rs
index e007f77309..92de982470 100644
--- a/src/core/lambda/io.rs
+++ b/src/core/lambda/io.rs
@@ -1,5 +1,4 @@
 use core::future::Future;
-use std::borrow::Cow;
 use std::hash::{Hash, Hasher};
 use std::pin::Pin;
 use std::sync::Arc;
@@ -144,7 +143,7 @@ impl IO {
                         .request_ctx
                         .runtime
                         .worker
-                        .call(Cow::Borrowed(method), value)
+                        .call(method, value)
                         .await
                         .map_err(EvaluationError::from)?;
 
diff --git a/src/core/mod.rs b/src/core/mod.rs
index 25a5d99dd4..c4d32bb90e 100644
--- a/src/core/mod.rs
+++ b/src/core/mod.rs
@@ -84,7 +84,7 @@ pub type EntityCache = dyn Cache<Key = u64, Value = ConstValue>;
 #[async_trait::async_trait]
 pub trait WorkerIO<In, Out>: Send + Sync + 'static {
     /// Calls a global JS function
-    async fn call(&self, name: Cow<'async_trait, str>, input: In) -> anyhow::Result<Option<Out>>;
+    async fn call(&self, name: &'async_trait str, input: In) -> anyhow::Result<Option<Out>>;
 }
 
 pub fn is_default<T: Default + Eq>(val: &T) -> bool {
diff --git a/src/core/worker.rs b/src/core/worker.rs
index 0a8a29c3c5..5c1c45d77a 100644
--- a/src/core/worker.rs
+++ b/src/core/worker.rs
@@ -1,4 +1,3 @@
-use std::borrow::Cow;
 
 use crate::core::{Response, WorkerIO};
 
@@ -6,7 +5,7 @@ pub struct DefaultJsRuntime;
 
 #[async_trait::async_trait]
 impl<A: Send + Sync + 'static, B> WorkerIO<A, B> for DefaultJsRuntime {
-    async fn call(&self, _: Cow<'async_trait, str>, _: A) -> anyhow::Result<Option<B>> {
+    async fn call(&self, _: &'async_trait str, _: A) -> anyhow::Result<Option<B>> {
         anyhow::bail!("JavaScript runtime is not supported in this build")
     }
 }