diff --git a/coverme/README.md b/coverme/README.md
index 0efcaa2..042c2f5 100644
--- a/coverme/README.md
+++ b/coverme/README.md
@@ -44,7 +44,7 @@ Todo-app с минимальной функциональностью + client.
 
 Health check:
 ```
-✗ curl -i -X GET localhost:6029/    
+✗ curl -i -X GET localhost:6029/
 HTTP/1.1 200 OK
 Content-Type: application/json
 Date: Thu, 19 Mar 2020 21:46:02 GMT
@@ -66,7 +66,7 @@ Content-Length: 51
 
 Получить todo по id:
 ```
-✗ curl -i localhost:6029/todo/0                                       
+✗ curl -i localhost:6029/todo/0
 HTTP/1.1 200 OK
 Content-Type: application/json
 Date: Thu, 19 Mar 2020 21:44:17 GMT
@@ -77,7 +77,7 @@ Content-Length: 51
 
 Получить все todo:
 ```
-✗ curl -i -X GET localhost:6029/todo                                        
+✗ curl -i -X GET localhost:6029/todo
 HTTP/1.1 200 OK
 Content-Type: application/json
 Date: Thu, 19 Mar 2020 21:44:37 GMT
@@ -85,3 +85,19 @@ Content-Length: 53
 
 [{"id":0,"title":"A","content":"a","finished":false}]
 ```
+
+Завершить todo:
+```
+✗ curl -i -X POST localhost:6029/todo/0/finish
+HTTP/1.1 200 OK
+Date: Thu, 24 Mar 2022 15:40:49 GMT
+Content-Length: 0
+
+✗ curl -i -X GET localhost:6029/todo
+HTTP/1.1 200 OK
+Content-Type: application/json
+Date: Thu, 24 Mar 2022 15:41:04 GMT
+Content-Length: 52
+
+[{"id":0,"title":"A","content":"a","finished":true}]%
+```
diff --git a/coverme/app/app.go b/coverme/app/app.go
index c9387cd..22d39b6 100644
--- a/coverme/app/app.go
+++ b/coverme/app/app.go
@@ -9,7 +9,6 @@ import (
 	"net/http"
 	"os"
 	"strconv"
-	"strings"
 
 	"github.com/gorilla/handlers"
 	"github.com/gorilla/mux"
@@ -34,10 +33,11 @@ func (app *App) Start(port int) {
 
 func (app *App) initRoutes() {
 	app.router = mux.NewRouter()
-	app.router.HandleFunc("/", app.status).Methods("Get")
-	app.router.HandleFunc("/todo", app.list).Methods("Get")
-	app.router.HandleFunc("/todo/{id:[0-9]+}", app.getTodo).Methods("Get")
-	app.router.HandleFunc("/todo/create", app.addTodo).Methods("Post")
+	app.router.HandleFunc("/", app.status).Methods("GET")
+	app.router.HandleFunc("/todo", app.list).Methods("GET")
+	app.router.HandleFunc("/todo/{id:[0-9]+}", app.getTodo).Methods("GET")
+	app.router.HandleFunc("/todo/{id:[0-9]+}/finish", app.finishTodo).Methods("POST")
+	app.router.HandleFunc("/todo/create", app.addTodo).Methods("POST")
 }
 
 func (app *App) run(addr string) {
@@ -80,7 +80,7 @@ func (app *App) addTodo(w http.ResponseWriter, r *http.Request) {
 }
 
 func (app *App) getTodo(w http.ResponseWriter, r *http.Request) {
-	id, err := strconv.Atoi(strings.TrimPrefix(r.URL.Path, "/todo/"))
+	id, err := strconv.Atoi(mux.Vars(r)["id"])
 	if err != nil {
 		utils.BadRequest(w, "ID must be an int")
 		return
@@ -95,6 +95,21 @@ func (app *App) getTodo(w http.ResponseWriter, r *http.Request) {
 	_ = utils.RespondJSON(w, http.StatusOK, todo)
 }
 
+func (app *App) finishTodo(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.Atoi(mux.Vars(r)["id"])
+	if err != nil {
+		utils.BadRequest(w, "ID must be an int")
+		return
+	}
+
+	if err := app.db.FinishTodo(models.ID(id)); err != nil {
+		utils.ServerError(w)
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+}
+
 func (app *App) status(w http.ResponseWriter, r *http.Request) {
 	_ = utils.RespondJSON(w, http.StatusOK, "API is up and working!")
 }
diff --git a/coverme/client/client.go b/coverme/client/client.go
index cac5a08..b3bbe22 100644
--- a/coverme/client/client.go
+++ b/coverme/client/client.go
@@ -69,3 +69,19 @@ func (c *Client) List() ([]*models.Todo, error) {
 	err = json.NewDecoder(resp.Body).Decode(&todos)
 	return todos, err
 }
+
+func (c *Client) Finish(id models.ID) error {
+	u := fmt.Sprintf("%s/todo/%d/finish", c.addr, id)
+
+	resp, err := http.Post(u, "application/json", nil)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = resp.Body.Close() }()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("unexpected status code %d", resp.StatusCode)
+	}
+
+	return err
+}
diff --git a/coverme/models/storage.go b/coverme/models/storage.go
index 07185ee..c4fc981 100644
--- a/coverme/models/storage.go
+++ b/coverme/models/storage.go
@@ -12,6 +12,7 @@ type Storage interface {
 	AddTodo(string, string) (*Todo, error)
 	GetTodo(ID) (*Todo, error)
 	GetAll() ([]*Todo, error)
+	FinishTodo(ID) error
 }
 
 type InMemoryStorage struct {
@@ -69,3 +70,16 @@ func (s *InMemoryStorage) GetAll() ([]*Todo, error) {
 
 	return out, nil
 }
+
+func (s *InMemoryStorage) FinishTodo(id ID) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	todo, ok := s.todos[id]
+	if !ok {
+		return fmt.Errorf("todo %d not found", id)
+	}
+
+	todo.MarkFinished()
+	return nil
+}