diff --git a/Cargo.lock b/Cargo.lock
index 98bb02b..32668a2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -152,7 +152,7 @@ checksum = "ea221b5284a47e40033bf9b66f35f984ec0ea2931eb03505246cd27a963f981b"
 
 [[package]]
 name = "deepl"
-version = "1.0.3"
+version = "1.0.4"
 dependencies = [
  "anyhow",
  "clap",
diff --git a/Cargo.toml b/Cargo.toml
index 3cd8742..556894b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "deepl"
-version = "1.0.3"
+version = "1.0.4"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 authors = ["Mathias Rothenhäusler <safemind@posteo.net"]
diff --git a/src/engine/params.rs b/src/engine/params.rs
index 0359311..dee92f6 100644
--- a/src/engine/params.rs
+++ b/src/engine/params.rs
@@ -28,7 +28,7 @@ pub struct Params {
     pub source_lang: String,
     pub target_lang: String,
     pub key: String,
-    uri: String,
+    pub uri: String,
     pub input: String,
 }
 
@@ -53,13 +53,6 @@ impl Params {
         })
     }
 
-    pub fn url(&self) -> Result<String> {
-        let url = sprintf!("%s", self.uri)
-            .map_err(|e| anyhow!("could not create request body: {e:?}"))?;
-
-        Ok(url)
-    }
-
     pub fn body(&self) -> Result<String> {
         let mut body = sprintf!(
             "text=%s&target_lang=%s",
diff --git a/src/engine/response.rs b/src/engine/response.rs
index da3426b..1c8b81a 100644
--- a/src/engine/response.rs
+++ b/src/engine/response.rs
@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 
 use crate::engine::params::Params;
-use anyhow::Result;
+use anyhow::{Result, anyhow};
 
 #[derive(Serialize, Deserialize, Default)]
 struct Translations {
@@ -16,7 +16,6 @@ pub struct DeeplResponse {
 
 impl DeeplResponse {
     pub fn get_text(&self, params: &Params) -> Result<String> {
-
         let max_src = self
             .translations
             .iter()
@@ -27,6 +26,12 @@ impl DeeplResponse {
         let mut out = String::new();
 
         for t in &self.translations {
+            if t.detected_source_language == params.target_lang {
+                return Err(anyhow!(
+                    "Add target language, source and target identical ({})",
+                    params.target_lang
+                ));
+            }
             out.push_str(&format!(
                 "{src} >>> {:<width$} \n{tgt} >>> {}\n",
                 params.input,
diff --git a/src/main.rs b/src/main.rs
index 34107f3..6dc4133 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -15,7 +15,7 @@ async fn main() -> Result<()> {
 
     let request = Request::builder()
         .method(Method::POST)
-        .uri(params.url()?)
+        .uri(&params.uri)
         .header("Authorization", format!("DeepL-Auth-Key {}", params.key))
         .header("content-type", "application/x-www-form-urlencoded")
         .body(Body::from(params.body()?))?;