diff --git a/src/api/fs.rs b/src/api/fs.rs
index 030cc79..ee3d276 100644
--- a/src/api/fs.rs
+++ b/src/api/fs.rs
@@ -1,4 +1,5 @@
 use mlua::UserData;
+use tokio::fs;
 
 #[derive(Clone)]
 pub struct FS {}
@@ -8,8 +9,7 @@ impl UserData for FS {
         methods.add_async_method(
             "write",
             |_l, _this, (filename, contents): (String, String)| async move {
-                tokio::fs::write(filename, contents).await.unwrap();
-                Ok(())
+                Ok(fs::write(filename, contents).await.unwrap())
             },
         )
     }
diff --git a/src/api/mod.rs b/src/api/mod.rs
index af36abf..f1317c0 100644
--- a/src/api/mod.rs
+++ b/src/api/mod.rs
@@ -2,14 +2,14 @@ pub mod fs;
 
 use mlua::Lua;
 use std::time::Duration;
-use tokio::time::sleep;
+use tokio::time;
 
 use self::fs::FS;
 
 pub fn load_builtins(lua: &Lua) {
     let sleep = lua
         .create_async_function(|_l, n: u64| async move {
-            sleep(Duration::from_secs(n)).await;
+            time::sleep(Duration::from_secs(n)).await;
             Ok(())
         })
         .unwrap();
diff --git a/src/cli/main.rs b/src/cli/main.rs
index 0fac1c7..aaf6136 100644
--- a/src/cli/main.rs
+++ b/src/cli/main.rs
@@ -31,6 +31,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
 
     runtime.load(&load_builtins);
     runtime.load(&load_apis);
+
     runtime.start().await;
 
     Ok(())
diff --git a/src/internal/lua/req.rs b/src/internal/lua/req.rs
index bf87a51..3c5fdea 100644
--- a/src/internal/lua/req.rs
+++ b/src/internal/lua/req.rs
@@ -1,6 +1,7 @@
 use std::collections::HashMap;
 
 use mlua::{LuaSerdeExt, UserData, UserDataFields};
+use serde_json::{from_str, Value};
 
 #[derive(Clone)]
 pub struct Part {
@@ -9,16 +10,10 @@ pub struct Part {
 }
 impl UserData for Part {
     fn add_fields<'lua, F: UserDataFields<'lua, Self>>(fields: &mut F) {
-        fields.add_field_method_set("filename", |_, this, value| {
-            this.filename = value;
-            Ok(())
-        });
+        fields.add_field_method_set("filename", |_, this, value| Ok(this.filename = value));
         fields.add_field_method_get("filename", |_, this| Ok(this.filename.to_owned()));
 
-        fields.add_field_method_set("content", |_, this, value| {
-            this.content = value;
-            Ok(())
-        });
+        fields.add_field_method_set("content", |_, this, value| Ok(this.content = value));
         fields.add_field_method_get("content", |_, this| Ok(this.content.to_owned()));
     }
 }
@@ -36,45 +31,25 @@ pub struct Req {
 
 impl UserData for Req {
     fn add_fields<'lua, F: UserDataFields<'lua, Self>>(fields: &mut F) {
-        fields.add_field_method_set("body", |_, this, value| {
-            this.body = value;
-            Ok(())
-        });
-        fields.add_field_method_get("body", |l, this| {
-            match serde_json::from_str::<serde_json::Value>(&this.body) {
-                Ok(value) => Ok(l.to_value(&value)?),
-                Err(_) => Ok(l.to_value(&this.body)?),
-            }
+        fields.add_field_method_set("body", |_, this, value| Ok(this.body = value));
+        fields.add_field_method_get("body", |l, this| match from_str::<Value>(&this.body) {
+            Ok(value) => Ok(l.to_value(&value)?),
+            Err(_) => Ok(l.to_value(&this.body)?),
         });
 
-        fields.add_field_method_set("form", |_, this, value| {
-            this.form = value;
-            Ok(())
-        });
+        fields.add_field_method_set("form", |_, this, value| Ok(this.form = value));
         fields.add_field_method_get("form", |_, this| Ok(this.form.to_owned()));
 
-        fields.add_field_method_set("headers", |_, this, value| {
-            this.headers = value;
-            Ok(())
-        });
+        fields.add_field_method_set("headers", |_, this, value| Ok(this.headers = value));
         fields.add_field_method_get("headers", |_, this| Ok(this.headers.to_owned()));
 
-        fields.add_field_method_set("method", |_, this, value| {
-            this.method = value;
-            Ok(())
-        });
+        fields.add_field_method_set("method", |_, this, value| Ok(this.method = value));
         fields.add_field_method_get("method", |_, this| Ok(this.method.to_owned()));
 
-        fields.add_field_method_set("params", |_, this, value| {
-            this.params = value;
-            Ok(())
-        });
+        fields.add_field_method_set("params", |_, this, value| Ok(this.params = value));
         fields.add_field_method_get("params", |_, this| Ok(this.params.to_owned()));
 
-        fields.add_field_method_set("parts", |_, this, value| {
-            this.parts = value;
-            Ok(())
-        });
+        fields.add_field_method_set("parts", |_, this, value| Ok(this.parts = value));
         fields.add_field_method_get("parts", |_, this| Ok(this.parts.to_owned()));
     }
 }
diff --git a/src/internal/lua/res.rs b/src/internal/lua/res.rs
index 99d97f5..50e3119 100644
--- a/src/internal/lua/res.rs
+++ b/src/internal/lua/res.rs
@@ -25,10 +25,7 @@ pub struct Res {
 
 impl UserData for Res {
     fn add_fields<'lua, F: UserDataFields<'lua, Self>>(fields: &mut F) {
-        fields.add_field_method_set("body", |_, this, value| {
-            this.body = value;
-            Ok(())
-        });
+        fields.add_field_method_set("body", |_, this, value| Ok(this.body = value));
         fields.add_field_method_get("body", |_, this| Ok(this.body.to_owned()));
 
         fields.add_field_method_set("json", |_, this, value| {