diff --git a/src/entities/book_instance.rs b/src/entities/book_instance.rs
index e2e213b..fa01818 100644
--- a/src/entities/book_instance.rs
+++ b/src/entities/book_instance.rs
@@ -1,14 +1,14 @@
 use sea_orm::entity::prelude::*;
 use serde::{Deserialize, Serialize};
 
-#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Eq, Serialize, Deserialize, utoipa::ToSchema)]
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize, utoipa::ToSchema)]
 #[sea_orm(table_name = "BookInstances")]
 #[schema(title="BookInstance", as=entities::BookInstance)]
 pub struct Model {
     #[sea_orm(primary_key, auto_increment = true)]
     pub id: u32,
-    pub price: i32,
-    pub sold_price: Option<i32>,
+    pub price: f32,
+    pub sold_price: Option<f32>,
     pub status: BookStatus,
     pub book_id: u32,
     pub owner_id: u32,
diff --git a/src/routes/book_instance.rs b/src/routes/book_instance.rs
index ffc5103..c87b759 100644
--- a/src/routes/book_instance.rs
+++ b/src/routes/book_instance.rs
@@ -49,7 +49,7 @@ pub struct BookInstanceCreateParams {
     book_id: u32,
     owner_id: u32,
     bal_id: u32,
-    price: i32,
+    price: f32,
 }
 
 #[axum::debug_handler]
@@ -99,7 +99,7 @@ pub async fn create_book_instance(
 pub struct BookInstanceUpdateParams {
     status: Option<book_instance::BookStatus>,
     owner_id: Option<u32>,
-    price: Option<i32>,
+    price: Option<f32>,
 }
 
 #[axum::debug_handler]
@@ -160,7 +160,7 @@ pub async fn update_book_instance(
 
 #[derive(Deserialize, Serialize, utoipa::ToSchema)]
 pub struct BookInstanceSaleParams {
-    price: i32,
+    price: f32,
 }
 
 #[axum::debug_handler]