diff --git a/src/operations/index.ts b/src/operations/index.ts
index f370cfd..b34c81e 100644
--- a/src/operations/index.ts
+++ b/src/operations/index.ts
@@ -36,7 +36,7 @@ import { BalanceChartComponent } from './balanceChart.component';
 import { CategoryChartComponent } from './categoryChart.component';
 import { OperationService } from './operation.service';
 
-var OperationController = require('./operation.controller');
+import { OperationController } from './operation.controller';
 
 export default angular.module('accountant.operations', [
     ngResource,
diff --git a/src/operations/operation.controller.ts b/src/operations/operation.controller.ts
index a81e8e5..9077cf2 100644
--- a/src/operations/operation.controller.ts
+++ b/src/operations/operation.controller.ts
@@ -1,89 +1,100 @@
-var operationFormTmpl   = require('./operation.form.tmpl.html'),
-    operationDeleteTmpl = require('./operation.delete.tmpl.html');
-
+import { Component, Inject, OnInit } from '@angular/core';
 import { Observable } from 'rxjs/Rx';
 
 import { ToastrService } from 'ngx-toastr';
 
+var operationFormTmpl   = require('./operation.form.tmpl.html'),
+    operationDeleteTmpl = require('./operation.delete.tmpl.html');
+
+import { Account } from '../accounts/account';
 import { AccountService } from '../accounts/account.service';
 import { Operation } from './operation';
 import { OperationService } from './operation.service';
 
-module.exports = function(
-    $modal,
-    accountIdService,
-    toastrService: ToastrService,
-    operationService: OperationService,
-    AccountService: AccountService
-){
-    var vm = this;
+export class OperationController {
+    private account: Account;
+    private minDate: Date;
+    private maxDate: Date;
+    private operations: Operation[];
+
+    constructor(
+        private $modal,
+        private accountIdService,
+        private toastrService: ToastrService,
+        private operationService: OperationService,
+        private AccountService: AccountService
+    ){
+        AccountService.get(this.accountIdService.get()).subscribe(account => {
+            this.account = account
+        });
+    }
 
     /*
      * Add an empty operation.
      */
-    vm.add = function() {
+    add() {
         var operation = new Operation();
-        operation.account_id = accountIdService.get();
+        operation.account_id = this.accountIdService.get();
 
-        return vm.modify(operation);
+        return this.modify(operation);
     };
 
     /*
      * Load operations.
      */
-    vm.load = function(minDate, maxDate) {
-        vm.minDate = minDate;
-        vm.maxDate = maxDate;
+    load(minDate, maxDate) {
+        this.minDate = minDate;
+        this.maxDate = maxDate;
 
-        return operationService.query(
-            accountIdService.get(),
+        return this.operationService.query(
+            this.accountIdService.get(),
             minDate,
             maxDate
         ).subscribe((operations: Operation[]) => {
-            vm.operations = operations;
+            this.operations = operations;
         });
     };
 
     /*
      * Toggle pointed indicator for an operation.
      */
-    vm.togglePointed = function(operation, rowform) {
+    togglePointed(operation, rowform) {
         operation.pointed = !operation.pointed;
 
-        vm.save(operation);
+        this.save(operation);
     };
 
     /*
      * Toggle cancel indicator for an operation.
      */
-    vm.toggleCanceled = function(operation) {
+    toggleCanceled(operation) {
         operation.canceled = !operation.canceled;
 
-        vm.save(operation);
+        this.save(operation);
     };
 
     /*
      * Save an operation and return a promise.
      */
-    vm.save = function(operation) {
+    save(operation) {
         operation.confirmed = true;
 
         var observable: Observable<Operation>;
 
         if(operation.id){
-            observable = operationService.update(operation);
+            observable = this.operationService.update(operation);
         } else {
-            observable = operationService.create(operation);
+            observable = this.operationService.create(operation);
         }
 
         return observable.subscribe((operation) => {
-            toastrService.success('Operation #' + operation.id + ' saved.');
+            this.toastrService.success('Operation #' + operation.id + ' saved.');
 
-            vm.load();
+            this.load(this.minDate, this.maxDate);
 
             return operation;
         }, (result) => {
-            toastrService.error(
+            this.toastrService.error(
                 'Error while saving operation: ' + result.message
             );
         });
@@ -92,15 +103,15 @@ module.exports = function(
     /*
      * Delete an operation and return a promise.
      */
-    vm.confirmDelete = function(operation) {
+    confirmDelete(operation) {
         var title = "Delete operation #" + operation.id;
 
-        $modal({
+        this.$modal({
             templateUrl: operationDeleteTmpl,
             controller: function($scope, title, operation, $delete) {
                 $scope.title = title;
                 $scope.operation = operation;
-                $scope.$delete = function() {
+                $scope.$delete = () => {
                     $scope.$hide();
                     $delete($scope.operation);
                 };
@@ -108,22 +119,24 @@ module.exports = function(
             locals: {
                 title: title,
                 operation: operation,
-                $delete: vm.delete
+                $delete: (operation: Operation) => {
+                    this.delete(operation);
+                }
             }
         });
     };
 
-    vm.delete = function(operation) {
+    delete(operation) {
         var id = operation.id;
 
-        return operationService.delete(operation).subscribe(() => {
-            toastrService.success('Operation #' + id + ' deleted.');
+        return this.operationService.delete(operation).subscribe(() => {
+            this.toastrService.success('Operation #' + id + ' deleted.');
 
-            vm.load();
+            this.load(this.minDate, this.maxDate);
 
             return operation;
         }, (result) => {
-            toastrService.error(
+            this.toastrService.error(
                 'An error occurred while trying to delete operation #' +
                 id + ':<br />' + result
             );
@@ -134,7 +147,7 @@ module.exports = function(
      * Open the popup to modify the operation, save it on confirm.
      * @returns a promise.
      */
-    vm.modify = function(operation) {
+    modify(operation) {
         // FIXME Alexis Lahouze 2017-06-15 i18n
         var title = "Operation";
 
@@ -142,12 +155,12 @@ module.exports = function(
             title = title + " #" + operation.id;
         }
 
-        $modal({
+        this.$modal({
             templateUrl: operationFormTmpl,
             controller: function($scope, title, operation, $save) {
                 $scope.title = title;
                 $scope.operation = operation;
-                $scope.$save = function() {
+                $scope.$save = () => {
                     $scope.$hide();
                     $save($scope.operation);
                 };
@@ -155,16 +168,14 @@ module.exports = function(
             locals: {
                 title: title,
                 operation: operation,
-                $save: vm.save
+                $save: (operation: Operation) => {
+                    this.save(operation);
+                }
             }
         });
     };
 
-    vm.onUpdate = function(dateRange) {
-        vm.load(dateRange.minDate, dateRange.maxDate);
+    onUpdate(dateRange) {
+        this.load(dateRange.minDate, dateRange.maxDate);
     };
-
-    AccountService.get(accountIdService.get()).subscribe(account => {
-        vm.account = account
-    });
 };