diff --git a/src/config.rs b/src/config.rs
index c4210ea..bebd44e 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -20,6 +20,7 @@ pub struct Config {
     pub book_library_url: String,
 
     pub converter_url: String,
+    pub converter_api_key: String,
 
     pub sentry_dsn: String
 }
@@ -35,6 +36,7 @@ impl Config {
             book_library_url: get_env("BOOK_LIBRARY_URL"),
 
             converter_url: get_env("CONVERTER_URL"),
+            converter_api_key: get_env("CONVERTER_API_KEY"),
 
             sentry_dsn: get_env("SENTRY_DSN")
         }
diff --git a/src/services/covert.rs b/src/services/covert.rs
index d9e268e..98dc7d7 100644
--- a/src/services/covert.rs
+++ b/src/services/covert.rs
@@ -18,6 +18,7 @@ pub async fn convert_file(file: SpooledTempFile, file_type: String) -> Option<Re
     let response = client
         .post(&config::CONFIG.converter_url)
         .multipart(form)
+        .header("Authorization", &config::CONFIG.converter_api_key)
         .send().await;
 
     let response = match response {