diff --git a/README.md b/README.md
index e8ffdc0..6ae3a97 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 ## GraphQL Server Todo
 
+- [with-mongoose](https://github.com/sergeyyarkov/graphql-server-todo/tree/with-mongoose)
+
 ### 🚀 Start Server:
 
 ```bash
diff --git a/src/graphql/typeDefs/mutation.js b/src/graphql/typeDefs/mutation.js
index 9bf944f..4b768fb 100644
--- a/src/graphql/typeDefs/mutation.js
+++ b/src/graphql/typeDefs/mutation.js
@@ -35,6 +35,45 @@ const Mutation = new GraphQLObjectType({
         }).save()
       },
     },
+    deleteCategory: {
+      type: CategoryType,
+      args: {
+        id: { type: new GraphQLNonNull(GraphQLID) }
+      },
+      resolve(parent, args) {
+        return Categories.findByIdAndRemove(args.id)
+      }
+    },
+    deleteNote: {
+      type: NoteType,
+      args: {
+        id: { type: new GraphQLNonNull(GraphQLID) }
+      },
+      resolve(parent, args) {
+        return Notes.findByIdAndRemove(args.id)
+      }
+    },
+    updateCategory: {
+      type: CategoryType,
+      args: {
+        id: { type: new GraphQLNonNull(GraphQLID) },
+        title: { type: new GraphQLNonNull(GraphQLString) }
+      },
+      resolve(parent, args) {
+        return Categories.findByIdAndUpdate(args.id, { $set: { title: args.title } }, { new: true })
+      }
+    },
+    updateNote: {
+      type: NoteType,
+      args: {
+        id: { type: new GraphQLNonNull(GraphQLID) },
+        title: { type: new GraphQLNonNull(GraphQLString) },
+        categoryId: { type: new GraphQLNonNull(GraphQLID) }
+      },
+      resolve(parent, args) {
+        return Notes.findByIdAndUpdate(args.id, { $set: { title: args.title, categoryId: args.categoryId } }, { new: true })
+      }
+    }
   },
 })
 
diff --git a/src/server.js b/src/server.js
index 71919bc..5ea8e7b 100644
--- a/src/server.js
+++ b/src/server.js
@@ -9,8 +9,8 @@ const PORT = 3001
 server.use('/graphql', graphqlHTTP({ schema, graphiql: true }))
 
 mongoose.connect(
-  'mongodb+srv://sergeyyarkov:1234@cluster0-1dsll.mongodb.net/todo-db?retryWrites=true&w=majority',
-  { useNewUrlParser: true, useUnifiedTopology: true }
+  'mongodb+srv://user:password@cluster0-1dsll.mongodb.net/todo-db?retryWrites=true&w=majority',
+  { useNewUrlParser: true, useUnifiedTopology: true, useFindAndModify: false }
 )
 
 mongoose.connection.on('error', (err) =>