diff --git a/src-tauri/src/services/accounts/category.rs b/src-tauri/src/services/accounts/category.rs
index 3411aad..18bb544 100644
--- a/src-tauri/src/services/accounts/category.rs
+++ b/src-tauri/src/services/accounts/category.rs
@@ -1,13 +1,16 @@
+// TODO: validation for all dto
 use crate::db::{
+    Db,
     entities::account_category::{
         ActiveModel as AccountCategoryActiveModel, Entity as AccountCategoryEntity,
     },
-    Db,
 };
+use migration::OnConflict;
 use sea_orm::{
-    ActiveModelTrait, ActiveValue::Set, ColumnTrait, ConnectionTrait, DatabaseConnection,
-    DatabaseTransaction, EntityTrait, IntoActiveModel, ModelTrait, PaginatorTrait, QueryFilter,
+    ActiveModelTrait, ActiveValue::Set, ColumnTrait, DatabaseConnection, EntityTrait,
+    IntoActiveModel, ModelTrait, PaginatorTrait, QueryFilter,
 };
+use serde::{Deserialize, Serialize};
 
 pub struct AccountCategory {
     pub id: i64,
@@ -18,17 +21,23 @@ pub struct AccountCategory {
     pub updated_at: String,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum AccountType {
-    Asset,     // Positive balance, e.g. Checking, Savings
+    #[serde(rename = "Asset")]
+    Asset, // Positive balance, e.g. Checking, Savings
+    #[serde(rename = "Liability")]
     Liability, // Negative balance, e.g. Credit Card
-    Unknown,   // Fallback for unknown types
+    #[serde(other, rename = "Unknown")]
+    Unknown, // Fallback for unknown types
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct CreateAccountCategoryRequest {
     pub name: String,
     pub account_type: AccountType,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct UpdateAccountCategoryRequest {
     pub name: Option<String>,
     pub account_type: Option<AccountType>,
@@ -129,9 +138,20 @@ impl AccountCategoryService for AccountCategoryServiceImpl {
         let new_category = AccountCategoryActiveModel {
             name: Set(create_request.name),
             account_type: Set(create_request.account_type.to_string()),
+            created_at: Set(chrono::Utc::now().to_rfc3339()),
+            updated_at: Set(chrono::Utc::now().to_rfc3339()),
             ..Default::default()
         };
-        let res = new_category.insert(tx).await.map_err(|e| e.to_string())?;
+        let res = AccountCategoryEntity::insert(new_category)
+            .on_conflict(
+                // force update to ensure a record is returned
+                OnConflict::column(crate::db::entities::account_category::Column::Name)
+                    .update_column(crate::db::entities::account_category::Column::Name)
+                    .to_owned(),
+            )
+            .exec_with_returning(tx)
+            .await
+            .map_err(|e| e.to_string())?;
         Ok(res.id)
     }
 
@@ -187,6 +207,7 @@ impl AccountCategoryService for AccountCategoryServiceImpl {
             if let Some(account_type) = update_request.account_type {
                 category.account_type = Set(account_type.to_string());
             }
+            category.updated_at = Set(chrono::Utc::now().to_rfc3339());
             category.update(tx).await.map_err(|e| e.to_string())?;
             Ok(())
         } else {
diff --git a/src-tauri/src/services/accounts/mod.rs b/src-tauri/src/services/accounts/mod.rs
index ac102e5..15cb159 100644
--- a/src-tauri/src/services/accounts/mod.rs
+++ b/src-tauri/src/services/accounts/mod.rs
@@ -1,3 +1,4 @@
+// TODO: validation for all dto
 use std::sync::Arc;
 
 use crate::{
@@ -17,9 +18,11 @@ use crate::{
 use sea_orm::{
     ActiveModelTrait, ActiveValue::Set, DatabaseConnection, EntityTrait, TransactionTrait,
 };
+use serde::{Deserialize, Serialize};
 
 pub mod category;
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Account {
     pub id: i64,
     pub name: String,
@@ -43,11 +46,13 @@ impl From<(AccountModel, AccountCategoryModel)> for Account {
     }
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct CreateAccountRequest {
     pub name: String,
     pub category: CreateAccountCategoryRequest,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct UpdateAccountRequest {
     pub name: Option<String>,
     pub category: Option<UpdateAccountCategoryRequest>,
@@ -125,8 +130,8 @@ impl AccountsService for AccountsServiceImpl {
 
         let new_account = AccountEntity::insert(AccountActiveModel {
             name: Set(create_request.name),
-            created_at: Set(chrono::Utc::now().to_string()),
-            updated_at: Set(chrono::Utc::now().to_string()),
+            created_at: Set(chrono::Utc::now().to_rfc3339()),
+            updated_at: Set(chrono::Utc::now().to_rfc3339()),
             account_category_id: Set(category_id),
             ..Default::default()
         })
@@ -162,7 +167,7 @@ impl AccountsService for AccountsServiceImpl {
                         .update_category_with_tx(id, category_request, &(&tx).into())
                         .await?;
                 }
-                active_model.updated_at = Set(chrono::Utc::now().to_string());
+                active_model.updated_at = Set(chrono::Utc::now().to_rfc3339());
                 //
                 active_model.update(&tx).await.map_err(|e| e.to_string())?;
                 let res = tx.commit().await.map_err(|e| e.to_string());