diff --git a/proto/api.proto b/proto/api.proto
index ebe0ec4..4e685fb 100644
--- a/proto/api.proto
+++ b/proto/api.proto
@@ -10,6 +10,7 @@ service DataProcessor {
 service Adresar {
     rpc CreateAdresar (AdresarRequest) returns (AdresarResponse);
     rpc GetAdresar (GetAdresarRequest) returns (AdresarResponse);
+    rpc UpdateAdresar (UpdateAdresarRequest) returns (AdresarResponse);
 }
 
 message GetAdresarRequest {
@@ -53,6 +54,25 @@ message AdresarResponse {
     string fax = 16;
 }
 
+message UpdateAdresarRequest {
+    int64 id = 1; // The ID of the Adresar entry to update
+    string firma = 2;
+    string kz = 3;
+    string drc = 4;
+    string ulica = 5;
+    string psc = 6;
+    string mesto = 7;
+    string stat = 8;
+    string banka = 9;
+    string ucet = 10;
+    string skladm = 11;
+    string ico = 12;
+    string kontakt = 13;
+    string telefon = 14;
+    string skladu = 15;
+    string fax = 16;
+}
+
 message DataRequest {
   string data = 1;
 }
diff --git a/src/adresar/handlers.rs b/src/adresar/handlers.rs
index 3c235c5..aa44aa2 100644
--- a/src/adresar/handlers.rs
+++ b/src/adresar/handlers.rs
@@ -2,6 +2,8 @@
 
 pub mod create_adresar;
 pub mod get_adresar;
+pub mod update_adresar;
 
 pub use create_adresar::create_adresar;
 pub use get_adresar::get_adresar;
+pub use update_adresar::update_adresar;
diff --git a/src/adresar/handlers/update_adresar.rs b/src/adresar/handlers/update_adresar.rs
new file mode 100644
index 0000000..8e8e728
--- /dev/null
+++ b/src/adresar/handlers/update_adresar.rs
@@ -0,0 +1,73 @@
+// src/adresar/handlers/update_adresar.rs
+use tonic::{Request, Response, Status};
+use sqlx::PgPool;
+use crate::adresar::models::Adresar;
+use crate::proto::multieko2::{UpdateAdresarRequest, AdresarResponse};
+
+pub async fn update_adresar(
+    db_pool: &PgPool,
+    request: UpdateAdresarRequest,
+) -> Result<AdresarResponse, Status> {
+    let adresar = sqlx::query_as!(
+        Adresar,
+        r#"
+        UPDATE adresar
+        SET
+            firma = $2,
+            kz = $3,
+            drc = $4,
+            ulica = $5,
+            psc = $6,
+            mesto = $7,
+            stat = $8,
+            banka = $9,
+            ucet = $10,
+            skladm = $11,
+            ico = $12,
+            kontakt = $13,
+            telefon = $14,
+            skladu = $15,
+            fax = $16
+        WHERE id = $1
+        RETURNING id, firma, kz, drc, ulica, psc, mesto, stat, banka, ucet, skladm, ico, kontakt, telefon, skladu, fax
+        "#,
+        request.id,
+        request.firma,
+        request.kz,
+        request.drc,
+        request.ulica,
+        request.psc,
+        request.mesto,
+        request.stat,
+        request.banka,
+        request.ucet,
+        request.skladm,
+        request.ico,
+        request.kontakt,
+        request.telefon,
+        request.skladu,
+        request.fax
+    )
+    .fetch_one(db_pool)
+    .await
+    .map_err(|e| Status::internal(e.to_string()))?;
+
+    Ok(AdresarResponse {
+        id: adresar.id,
+        firma: adresar.firma,
+        kz: adresar.kz.unwrap_or_default(),
+        drc: adresar.drc.unwrap_or_default(),
+        ulica: adresar.ulica.unwrap_or_default(),
+        psc: adresar.psc.unwrap_or_default(),
+        mesto: adresar.mesto.unwrap_or_default(),
+        stat: adresar.stat.unwrap_or_default(),
+        banka: adresar.banka.unwrap_or_default(),
+        ucet: adresar.ucet.unwrap_or_default(),
+        skladm: adresar.skladm.unwrap_or_default(),
+        ico: adresar.ico.unwrap_or_default(),
+        kontakt: adresar.kontakt.unwrap_or_default(),
+        telefon: adresar.telefon.unwrap_or_default(),
+        skladu: adresar.skladu.unwrap_or_default(),
+        fax: adresar.fax.unwrap_or_default(),
+    })
+}
diff --git a/src/proto/descriptor.bin b/src/proto/descriptor.bin
index dcd6086..caba16b 100644
Binary files a/src/proto/descriptor.bin and b/src/proto/descriptor.bin differ
diff --git a/src/server/mod.rs b/src/server/mod.rs
index 7a1d79c..f20eb54 100644
--- a/src/server/mod.rs
+++ b/src/server/mod.rs
@@ -1,12 +1,12 @@
 // src/server/mod.rs
 use tonic::{Request, Response, Status};
-use tonic_reflection::server::Builder as ReflectionBuilder; // Import tonic-reflection
+use tonic_reflection::server::Builder as ReflectionBuilder;
 use crate::db;
-use crate::adresar::handlers::{create_adresar, get_adresar};
+use crate::adresar::handlers::{create_adresar, get_adresar, update_adresar}; // Import the new handler
 use crate::proto::multieko2::{
-    AdresarRequest, AdresarResponse, GetAdresarRequest,
+    AdresarRequest, AdresarResponse, GetAdresarRequest, UpdateAdresarRequest,
     adresar_server::{Adresar, AdresarServer},
-    FILE_DESCRIPTOR_SET, // Import the generated file descriptor set
+    FILE_DESCRIPTOR_SET,
 };
 
 pub struct AdresarService {
@@ -30,6 +30,14 @@ impl Adresar for AdresarService {
         let response = get_adresar(&self.db_pool, request.into_inner()).await?;
         Ok(Response::new(response))
     }
+
+    async fn update_adresar(
+        &self,
+        request: Request<UpdateAdresarRequest>,
+    ) -> Result<Response<AdresarResponse>, Status> {
+        let response = update_adresar(&self.db_pool, request.into_inner()).await?;
+        Ok(Response::new(response))
+    }
 }
 
 pub async fn run_server(db_pool: sqlx::PgPool) -> Result<(), Box<dyn std::error::Error>> {
@@ -38,15 +46,14 @@ pub async fn run_server(db_pool: sqlx::PgPool) -> Result<(), Box<dyn std::error:
 
     println!("Server listening on {}", addr);
 
-    // Enable reflection
     let reflection_service = ReflectionBuilder::configure()
-        .register_encoded_file_descriptor_set(FILE_DESCRIPTOR_SET) // Register the file descriptor set
-        .build()
+        .register_encoded_file_descriptor_set(FILE_DESCRIPTOR_SET)
+        .build_v1()
         .unwrap();
 
     tonic::transport::Server::builder()
         .add_service(AdresarServer::new(adresar_service))
-        .add_service(reflection_service) // Add the reflection service
+        .add_service(reflection_service)
         .serve(addr)
         .await?;