diff --git a/src/domain/collaboration/repository.rs b/src/domain/collaboration/repository.rs
index 0464c96..268f6dd 100644
--- a/src/domain/collaboration/repository.rs
+++ b/src/domain/collaboration/repository.rs
@@ -1,3 +1,6 @@
+use async_trait::async_trait;
+use sea_orm::DbErr;
+
 pub type Collaboration = crate::domain::collaboration::model::Model;
 
 pub struct NewCollaboration {
@@ -5,9 +8,10 @@ pub struct NewCollaboration {
     pub user_id: i32
 }
 
+#[async_trait]
 pub trait CollaborationRepository {
-    fn find_task_collaborators(task_id: i32) -> Vec<Collaboration>;
-    fn find_user_collaborations(user_id: i32) -> Vec<Collaboration>;
-    fn add(collaboration: NewCollaboration) -> Collaboration; 
-    fn remove(collaboration_id: i32) -> bool; 
+    fn find_task_collaborators(&self, task_id: i32) -> Result<Vec<Collaboration>, DbErr>;
+    fn find_user_collaborations(&self, user_id: i32) -> Result<Vec<Collaboration>, DbErr>;
+    fn add(&self, collaboration: NewCollaboration) -> Result<Collaboration, DbErr>; 
+    fn remove(&self, collaboration_id: i32) -> Result<bool, DbErr>; 
 }
\ No newline at end of file
diff --git a/src/domain/notification/model.rs b/src/domain/notification/model.rs
index 58c872d..89164ab 100644
--- a/src/domain/notification/model.rs
+++ b/src/domain/notification/model.rs
@@ -10,6 +10,7 @@ pub struct Model {
     pub user_id: Option<i32>,
     pub task_id: Option<i32>,
     pub message: String,
+    #[sea_orm(default_value = false)]
     pub read: bool,
     pub created_at: Option<DateTime>,
 }
diff --git a/src/domain/notification/repository.rs b/src/domain/notification/repository.rs
index ad77a40..5835e9f 100644
--- a/src/domain/notification/repository.rs
+++ b/src/domain/notification/repository.rs
@@ -1,14 +1,10 @@
-pub type Notification = crate::domain::notification::model::Model;
-
-pub struct NewNotification {
-    pub user_id: Option<i32>,
-    pub task_id: Option<i32>,
-    pub message: String,
-    pub read: bool,
-}
+use async_trait::async_trait;
+use sea_orm::DbErr;
+use super::model::{ Model as Notification };
 
+#[async_trait]
 pub trait NotificationRepository {
-    fn find_notifications(user_id: i32, page_number: u8) -> Vec<Notification>;
-    fn create_notification(notification: NewNotification) -> Notification;
-    fn mark_notification_as_read(notification_id: i32) -> bool;
-}
\ No newline at end of file
+    async fn find_notifications(&self, user_id: i32, page_number: u8) -> Result<Vec<Notification>, DbErr>;
+    async fn create_notification(&self, notification: Notification) -> Result<Notification, DbErr>;
+    async fn mark_notification_as_read(&self, notification_id: i32) -> Result<Notification, DbErr>;
+}
diff --git a/src/domain/task/repository.rs b/src/domain/task/repository.rs
index b9143f9..aeb7bc0 100644
--- a/src/domain/task/repository.rs
+++ b/src/domain/task/repository.rs
@@ -19,4 +19,3 @@ pub trait TaskRepository {
     async fn update(&self, task_id: i32, task: Task) -> Result<Task, DbErr>;
     async fn delete(&self, task_id: i32) -> Result<bool, DbErr>;
 }
-
diff --git a/src/infrastructure/persistence/repositories/collaborators_repository.rs b/src/infrastructure/persistence/repositories/collaborators_repository.rs
index e69de29..a0fd009 100644
--- a/src/infrastructure/persistence/repositories/collaborators_repository.rs
+++ b/src/infrastructure/persistence/repositories/collaborators_repository.rs
@@ -0,0 +1,34 @@
+use sea_orm::DatabaseConnection;
+use async_trait::async_trait;
+use sea_orm::DbErr;
+use crate::domain::collaboration::repository::Collaboration;
+use crate::domain::collaboration::repository::CollaborationRepository;
+
+pub struct CollaborationRepo {
+    db: DatabaseConnection
+}
+
+impl CollaborationRepo {
+    fn _new(db: DatabaseConnection) -> Self {
+        Self { db }
+    }
+}
+
+#[async_trait]
+impl CollaborationRepository for CollaborationRepo {
+    fn find_task_collaborators(&self, task_id: i32) -> Result<Vec<Collaboration>, DbErr> {
+        todo!()
+    }
+
+    fn find_user_collaborations(&self, user_id: i32) -> Result<Vec<Collaboration>, DbErr> {
+        todo!()
+    }
+
+    fn add(&self, collaboration: crate::domain::collaboration::repository::NewCollaboration) -> Result<Collaboration, DbErr> {
+        todo!()
+    }
+
+    fn remove(&self, collaboration_id: i32) -> Result<bool, DbErr> {
+        todo!()
+    }
+}
\ No newline at end of file
diff --git a/src/infrastructure/persistence/repositories/notification_repository.rs b/src/infrastructure/persistence/repositories/notification_repository.rs
index e69de29..bde8bef 100644
--- a/src/infrastructure/persistence/repositories/notification_repository.rs
+++ b/src/infrastructure/persistence/repositories/notification_repository.rs
@@ -0,0 +1,45 @@
+use sea_orm::{ActiveModelTrait, ColumnTrait, DatabaseConnection, DbErr, EntityTrait, PaginatorTrait, QueryFilter, Set};
+use async_trait::async_trait;
+use crate::domain::notification::model::{Entity as NotificationEntity, Model as Notification, Column, ActiveModel};
+use crate::domain::notification::repository::NotificationRepository;
+
+pub struct NotificationRepo {
+    db: DatabaseConnection,
+}
+
+impl NotificationRepo {
+    pub fn _new(db: DatabaseConnection) -> Self {
+        Self { db }
+    }
+}
+
+#[async_trait]
+impl NotificationRepository for NotificationRepo {
+    async fn find_notifications(&self, user_id: i32, page_number: u8) -> Result<Vec<crate::domain::notification::model::Model>, sea_orm::DbErr> {
+        NotificationEntity::find()
+            .filter(Column::UserId.eq(user_id))
+            .paginate(&self.db, page_number as u64)
+            .fetch()
+            .await
+    }
+
+    async fn create_notification(&self, notification: Notification) -> Result<crate::domain::notification::model::Model, sea_orm::DbErr> {
+        let new_notification = ActiveModel {
+            user_id: Set(notification.user_id),
+            task_id: Set(notification.task_id),
+            message: Set(notification.message),
+            ..Default::default()
+        };
+        new_notification.insert(&self.db).await
+    }
+
+    async fn mark_notification_as_read(&self, notification_id: i32) -> Result<Notification, sea_orm::DbErr> {
+        let notification_record = NotificationEntity::find_by_id(notification_id).one(&self.db).await?;
+        let mut notification: ActiveModel = notification_record.ok_or(DbErr::RecordNotFound("No Such a Notification".to_string()))?.into();
+        
+        notification.read = Set(true);
+        
+        notification.update(&self.db).await
+        
+    }
+}
diff --git a/src/infrastructure/persistence/repositories/task_repository.rs b/src/infrastructure/persistence/repositories/task_repository.rs
index 81656c8..e1b4135 100644
--- a/src/infrastructure/persistence/repositories/task_repository.rs
+++ b/src/infrastructure/persistence/repositories/task_repository.rs
@@ -29,12 +29,10 @@ impl TaskRepository for TaskRepo {
     }
 
     async fn find(&self, limit: Option<u8>) -> Result<Vec<Task>, DbErr> {
-        let query = TaskEntity::find()
+        TaskEntity::find()
             .limit(limit.unwrap_or(10) as u64)
             .all(&self.db)
-            .await?;
-
-        Ok(query)
+            .await
     }
 
     async fn filter_tasks(