diff --git a/server/src/controller/project.controller.ts b/server/src/controller/project.controller.ts
index 9e86081..4413845 100644
--- a/server/src/controller/project.controller.ts
+++ b/server/src/controller/project.controller.ts
@@ -1,90 +1,113 @@
 import { Router } from "express";
 import { ProjectDto } from "../dto/poject.dto";
+import { NewProjectDto } from "../dto/project.new.dto";
+import { UpdateProjectDto } from "../dto/project.update.dto";
 import { ProjectService } from "../service/project.service";
+import {
+  CreateResponse, DeleteResponse, IndexResponse,
+  UpdateResponse
+} from "./typings/responses";
 
 const router = Router();
 export const ProjectRoutes = router;
 
 export const apiNamespace = "/projects";
 
-router.get(apiNamespace, async (req, res) => {
-  const projects = await ProjectService.listAllByUserId(req.userId);
+router.get<typeof apiNamespace, IndexResponse<ProjectDto>>(
+  apiNamespace,
+  async (req, res) => {
+    const projects = await ProjectService.listAllByUserId(req.userId);
 
-  const response: ProjectDto[] = projects.map<ProjectDto>((project) => ({
-    id: project.id,
-    name: project.name,
-  }));
-
-  res.json({
-    data: response
-  });
-});
-
-router.post(apiNamespace, (req, res) => {
-  const { name } = req.body;
-
-  ProjectService.create({
-    name,
-    userId: req.userId,
-  })
-    .then((project) => {
-      const respose: ProjectDto = {
+    res.json({
+      data: projects.map<ProjectDto>((project) => ({
         id: project.id,
         name: project.name,
-      };
-
-      res.json(respose);
-    })
-    .catch((err) => {
-      res.status(422).json({
-        error: err.message,
-      });
-    });
-});
-
-router.put(`${apiNamespace}/:id`, async (req, res) => {
-  const { id } = req.params;
-  const { name } = req.body;
-  const projectId = parseInt(id);
-
-  const projectToBeUpdated = await ProjectService.findProjectFromUserById(req.userId, projectId);
-
-  if (projectToBeUpdated) {
-    ProjectService.update(projectToBeUpdated, {
-      name,
-    }).then((success) => {
-      if (success) {
-        res.status(204).json();
-      } else {
-        res.status(402).json();
-      }
-    });
-  } else {
-    res.status(404).json({
-      error: "Project not found",
+      })),
     });
   }
-});
+);
 
-router.delete(`${apiNamespace}/:id`, async (req, res) => {
-  const { id } = req.params;
-  const projectId = parseInt(id);
+router.post<typeof apiNamespace, unknown, CreateResponse<ProjectDto>, NewProjectDto>(
+  apiNamespace,
+  (req, res) => {
+    const { name } = req.body;
 
-  const projecToBeDeleted = await ProjectService.findProjectFromUserById(req.userId, projectId);
+    ProjectService.create(req.userId, {
+      name,
+    })
+      .then((project) => {
+        res.json({
+          data: {
+            id: project.id,
+            name: project.name,
+          },
+        });
+      })
+      .catch((err) => {
+        res.status(422).json({
+          errors: [err.message],
+        });
+      });
+  }
+);
 
-  if (projecToBeDeleted) {
-    const success = await ProjectService.destroy(projecToBeDeleted);
+const putPath = `${apiNamespace}/:taskId`;
+router.put<typeof putPath, { taskId: string }, UpdateResponse<ProjectDto>, UpdateProjectDto>(
+  putPath,
+  async (req, res) => {
+    const { taskId } = req.params;
+    const { name } = req.body;
+    const projectId = parseInt(taskId);
 
-    if (success) {
-      res.json({ success });
+    const projectToBeUpdated = await ProjectService.findProjectFromUserById(
+      req.userId,
+      projectId
+    );
+
+    if (projectToBeUpdated) {
+      ProjectService.update(projectToBeUpdated, {
+        name,
+      }).then((success) => {
+        if (success) {
+          res.status(204).json();
+        } else {
+          res.status(402).json();
+        }
+      });
     } else {
-      res.status(422).json({
-        error: "Could not delete project",
+      res.status(404).json({
+        errors: ["Project not found"],
       });
     }
-  } else {
-    res.status(404).json({
-      error: "Project not found",
-    });
   }
-});
+);
+
+const deletePath = `${apiNamespace}/:taskId`;
+router.delete<typeof deletePath, { taskId: string }, DeleteResponse>(
+  deletePath,
+  async (req, res) => {
+    const { taskId } = req.params;
+    const projectId = parseInt(taskId);
+
+    const projecToBeDeleted = await ProjectService.findProjectFromUserById(
+      req.userId,
+      projectId
+    );
+
+    if (projecToBeDeleted) {
+      const success = await ProjectService.destroy(projecToBeDeleted);
+
+      if (success) {
+        res.json({ success });
+      } else {
+        res.status(422).json({
+          errors: ["Could not delete project"],
+        });
+      }
+    } else {
+      res.status(404).json({
+        errors: ["Project not found"],
+      });
+    }
+  }
+);
diff --git a/server/src/controller/typings/responses.d.ts b/server/src/controller/typings/responses.d.ts
new file mode 100644
index 0000000..9ce4be5
--- /dev/null
+++ b/server/src/controller/typings/responses.d.ts
@@ -0,0 +1,25 @@
+export type ErrorResponse = {
+  errors: string[];
+};
+
+export type IndexResponse<TData> = {
+  data: TData[];
+};
+
+export type CreateResponse<TData> =
+  | {
+      data: TData;
+    }
+  | ErrorResponse;
+
+export type UpdateResponse<TData> =
+  | {
+      data: TData;
+    }
+  | ErrorResponse;
+
+export type DeleteResponse =
+  | {
+      success: boolean;
+    }
+  | ErrorResponse;
diff --git a/server/src/dto/newProject.dto.ts b/server/src/dto/project.new.dto.ts
similarity index 73%
rename from server/src/dto/newProject.dto.ts
rename to server/src/dto/project.new.dto.ts
index 00d077a..d329dc9 100644
--- a/server/src/dto/newProject.dto.ts
+++ b/server/src/dto/project.new.dto.ts
@@ -1,4 +1,3 @@
 export type NewProjectDto = {
   name: string
-  userId: number
 }
\ No newline at end of file
diff --git a/server/src/dto/updateProject.dto.ts b/server/src/dto/project.update.dto.ts
similarity index 68%
rename from server/src/dto/updateProject.dto.ts
rename to server/src/dto/project.update.dto.ts
index 9f09a39..ab90efd 100644
--- a/server/src/dto/updateProject.dto.ts
+++ b/server/src/dto/project.update.dto.ts
@@ -1,3 +1,3 @@
 export type UpdateProjectDto = {
-  name: string
+  name?: string
 }
\ No newline at end of file
diff --git a/server/src/dto/newTask.dto.ts b/server/src/dto/task.new.dto.ts
similarity index 100%
rename from server/src/dto/newTask.dto.ts
rename to server/src/dto/task.new.dto.ts
diff --git a/server/src/dto/updateTask.dto.ts b/server/src/dto/task.update.dto.ts
similarity index 100%
rename from server/src/dto/updateTask.dto.ts
rename to server/src/dto/task.update.dto.ts
diff --git a/server/src/dto/newUser.dto.ts b/server/src/dto/user.new.dto.ts
similarity index 100%
rename from server/src/dto/newUser.dto.ts
rename to server/src/dto/user.new.dto.ts
diff --git a/server/src/dto/session.dto.ts b/server/src/dto/user.session.dto.ts
similarity index 100%
rename from server/src/dto/session.dto.ts
rename to server/src/dto/user.session.dto.ts
diff --git a/server/src/service/project.service.ts b/server/src/service/project.service.ts
index c97eb9a..0bb8ef6 100644
--- a/server/src/service/project.service.ts
+++ b/server/src/service/project.service.ts
@@ -1,14 +1,17 @@
 import { validate } from "class-validator";
-import { NewProjectDto } from "../dto/newProject.dto";
-import { UpdateProjectDto } from "../dto/updateProject.dto";
+import { NewProjectDto } from "../dto/project.new.dto";
+import { UpdateProjectDto } from "../dto/project.update.dto";
 import { Project } from "../entity/project.entity";
 import { User } from "../entity/user.entity";
 import { projectRepository } from "../repository/project.repository";
 import { UserService } from "./user.service";
 
-async function create(newProject: NewProjectDto): Promise<Project> {
+async function create(
+  userId: User["id"],
+  newProject: NewProjectDto
+): Promise<Project> {
   const project = new Project();
-  const user = await UserService.findUserById(newProject.userId);
+  const user = await UserService.findUserById(userId);
 
   project.name = newProject.name;
   project.user = user;
@@ -40,9 +43,9 @@ async function destroy(project: Project): Promise<boolean> {
 
 async function update(
   project: Project,
-  updateProjectDto: UpdateProjectDto
+  data: UpdateProjectDto
 ): Promise<boolean> {
-  projectRepository.merge(project, updateProjectDto);
+  projectRepository.merge(project, data);
   const updateResult = await projectRepository.save(project);
 
   return !!updateResult;
@@ -64,5 +67,5 @@ export const ProjectService = {
   listAllByUserId,
   destroy,
   update,
-  findProjectFromUserById
+  findProjectFromUserById,
 };
diff --git a/server/src/service/task.service.ts b/server/src/service/task.service.ts
index 27cf9ea..c75d258 100644
--- a/server/src/service/task.service.ts
+++ b/server/src/service/task.service.ts
@@ -1,4 +1,4 @@
-import { NewTaskDto } from "../dto/newTask.dto";
+import { NewTaskDto } from "../dto/task.new.dto";
 import { Project } from "../entity/project.entity";
 import { Task } from "../entity/task.entity";
 import { taskRepository } from "../repository/task.repository";
diff --git a/server/src/service/user.service.ts b/server/src/service/user.service.ts
index deb267e..110be2d 100644
--- a/server/src/service/user.service.ts
+++ b/server/src/service/user.service.ts
@@ -1,5 +1,5 @@
 import { validate } from "class-validator"
-import { NewUserDto } from "../dto/newUser.dto"
+import { NewUserDto } from "../dto/user.new.dto"
 import { User } from "../entity/user.entity"
 import { userRepository } from "../repository/user.repository"
 import { AuthService } from "./auth.service"