diff --git a/Cargo.lock b/Cargo.lock
index 34f5b43..9ae47c4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1834,6 +1834,7 @@ dependencies = [
  "rocket_codegen",
  "rocket_http",
  "serde",
+ "serde_json",
  "state",
  "tempfile",
  "time",
diff --git a/Cargo.toml b/Cargo.toml
index 49b7b81..574196d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-rocket      = "0.5.0"
+rocket      = {version = "0.5.0", features = ["json"]}
 serde       = {version = "1.0.198", features = ["derive"]}
 serde_json  = "1.0.111"
 num-format  = "0.4.4"
diff --git a/src/main.rs b/src/main.rs
index 77afd63..b4f9707 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,12 +1,11 @@
 #[macro_use] extern crate rocket;
-use rocket_dyn_templates::Template;
-use rocket_dyn_templates::context;
+use rocket_dyn_templates::{Template, context};
 use rocket::fs::FileServer;
-use rocket::State;
+use rocket::{State, tokio};
+use rocket::serde::json::Json;
+use rocket::response::Redirect;
 use std::sync::{Arc, Mutex};
 use std::time::Duration;
-use rocket::tokio;
-use rocket::response::Redirect;
 use either::Either;
 use serde_json::Value;
 
@@ -229,18 +228,18 @@ pub async fn search(input: Option<&str>) -> Either<Template, Redirect> {
 // Owner API.
 // Whitelisted methods: get_connected_peers, get_peers, get_status.
 #[post("/v2/owner", data="<data>")]
-async fn api_owner(data: &str) -> String {
+async fn api_owner(data: &str) -> Json<String> {
     if CONFIG.public_api == "enabled" {
         let result = serde_json::from_str(data);
 
         let v: Value = match result {
             Ok(value) => value,
-            Err(_err) => return "{\"error\":\"bad syntax\"}".to_string(),
+            Err(_err) => return Json("{\"error\":\"bad syntax\"}".to_string()),
         };
 
         let method = match v["method"].as_str() {
             Some(value) => value,
-            _ => return "{\"error\":\"bad syntax\"}".to_string(),
+            _ => return Json("{\"error\":\"bad syntax\"}".to_string()),
         };
     
         if method == "get_connected_peers" || method == "get_peers" || method == "get_status" {
@@ -248,15 +247,15 @@ async fn api_owner(data: &str) -> String {
 
             let result = match resp {
                 Ok(value) => value,
-                Err(_err) => return "{\"error\":\"rpc call failed\"}".to_string(),
+                Err(_err) => return Json("{\"error\":\"rpc call failed\"}".to_string()),
             };
 
-            return result.to_string();
+            return Json(result.to_string());
         }
 
-        "{\"error\":\"not allowed\"}".to_string()
+        Json("{\"error\":\"not allowed\"}".to_string())
     } else {
-        "{\"error\":\"not allowed\"}".to_string()
+        Json("{\"error\":\"not allowed\"}".to_string())
     }
 }
 
@@ -264,30 +263,30 @@ async fn api_owner(data: &str) -> String {
 // Foreign API.
 // All methods are whitelisted.
 #[post("/v2/foreign", data="<data>")]
-async fn api_foreign(data: &str) -> String {
+async fn api_foreign(data: &str) -> Json<String> {
     if CONFIG.public_api == "enabled" {
         let result = serde_json::from_str(data);
 
         let v: Value = match result {
             Ok(value) => value,
-            Err(_err) => return "{\"error\":\"bad syntax\"}".to_string(),
+            Err(_err) => return Json("{\"error\":\"bad syntax\"}".to_string()),
         };
 
         let method = match v["method"].as_str() {
             Some(value) => value,
-            _ => return "{\"error\":\"bad syntax\"}".to_string(),
+            _ => return Json("{\"error\":\"bad syntax\"}".to_string()),
         };
 
         let resp = requests::call(method, v["params"].to_string().as_str(), v["id"].to_string().as_str(), "foreign").await;
 
         let result = match resp {
             Ok(value) => value,
-            Err(_err) => return "{\"error\":\"rpc call failed\"}".to_string(),
+            Err(_err) => return Json("{\"error\":\"rpc call failed\"}".to_string()),
         };
 
-        return result.to_string();
+        return Json(result.to_string());
     } else {
-        "{\"error\":\"not allowed\"}".to_string()
+        Json("{\"error\":\"not allowed\"}".to_string())
     }
 }
 
diff --git a/src/requests.rs b/src/requests.rs
index 8ef7761..2336bde 100644
--- a/src/requests.rs
+++ b/src/requests.rs
@@ -80,9 +80,9 @@ pub async fn call(method: &str, params: &str, id: &str, rpc_type: &str) -> Resul
 
     let client = reqwest::Client::new();
     let result = client.post(rpc_url)
-                       .body(format!("{{\"method\": \"{}\", \"params\": {}, \"id\": {}}}", method, params, id))
+                       .body(format!("{{\"method\": \"{}\", \"params\": {}, \"id\": {}, \"jsonrpc\": \"2.0\"}}", method, params, id))
                        .basic_auth(CONFIG.user.clone(), Some(secret))
-                       .header("content-type", "plain/text")
+                       .header("content-type", "application/json")
                        .send()
                        .await?;