diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index aa86549..21b9816 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -104,6 +104,7 @@ dependencies = [
  "chrono",
  "dotenv",
  "serde",
+ "serde_json",
  "sqlx",
  "tokio",
 ]
diff --git a/backend/Cargo.toml b/backend/Cargo.toml
index cf57853..64426fd 100644
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2024"
 [dependencies]
 axum = "0.8.9"
 serde = { version = "1.0.228", features = ["derive"] }
+serde_json = "1.0.149"
 sqlx = { version = "0.8.6", features = ["postgres", "runtime-tokio", "tls-native-tls"] }
 tokio = { version = "1.52.1", features = ["rt-multi-thread", "macros"] }
 dotenv = "0.15.0"
diff --git a/backend/src/models.rs b/backend/src/models.rs
index b1fe788..c2e73cc 100644
--- a/backend/src/models.rs
+++ b/backend/src/models.rs
@@ -1,6 +1,6 @@
 use serde::{Deserialize, Serialize};
 
-#[derive(Clone, Debug, PartialEq, Deserialize)]
+#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
 pub enum category {
     WhiteboardBeamer,
     Internet,
@@ -10,7 +10,7 @@ pub enum category {
     Sonstiges,
 }
 
-#[derive(Deserialize, Clone, PartialEq, Debug)]
+#[derive(Deserialize, Serialize, PartialEq, Debug)]
 pub struct ticket {
     pub id: i32,
     pub category: category,
@@ -21,7 +21,7 @@ pub struct ticket {
     pub user_id: i16,
 }
 
-#[derive(Deserialize, Clone, PartialEq, Debug)]
+#[derive(Deserialize, Serialize, PartialEq, Debug)]
 pub struct user {
     pub id: i16,
     pub first_name: String,