diff --git a/src/components/excel/Excel.ts b/src/components/excel/Excel.ts
index 92bda52..d856a30 100644
--- a/src/components/excel/Excel.ts
+++ b/src/components/excel/Excel.ts
@@ -2,6 +2,7 @@ import { Store } from '../../core/createStore';
 import { $, Dom } from '../../core/dom';
 import { Emitter } from '../../core/Emitter';
 import { ExcelComponent } from '../../core/ExcelComponent';
+import { StoreSubscriber } from '../../core/StoreSubscriber';
 
 interface ExcelOptionsType {
   components: any[],
@@ -13,12 +14,14 @@ export class Excel {
   components: any[];
   emitter: Emitter;
   store: Store;
+  subscriber: StoreSubscriber;
 
   constructor(selector: string, options: ExcelOptionsType) {
     this.$el = $(selector);
     this.components = options.components;
     this.emitter = new Emitter();
     this.store = options.store;
+    this.subscriber = new StoreSubscriber(this.store);
 
     console.log(`Created new Excel class in ${selector} with options: ${options}`);
   }
@@ -46,10 +49,13 @@ export class Excel {
 
   render() {
     this.$el.append(this.getRoot());
+
+    this.subscriber.subscribeComponents(this.components);
     this.components.forEach(component => component.init());
   }
 
   destroy() {
+    this.subscriber.unsubscribeFromStore();
     this.components.forEach(component => component.destroy());
   }
 }
diff --git a/src/components/formula/Formula.ts b/src/components/formula/Formula.ts
index 0886020..215ab89 100644
--- a/src/components/formula/Formula.ts
+++ b/src/components/formula/Formula.ts
@@ -10,6 +10,7 @@ export class Formula extends ExcelComponent {
     super($root, {
       listeners: ['input', 'keydown'],
       name: 'Formula',
+      subscribe: ['currentText'],
       ...options,
     });
   }
@@ -26,16 +27,13 @@ export class Formula extends ExcelComponent {
 
     this.formulaInput = this.$root.find('#formula-input');
 
-    // this.$on('table:input', text => {
-    //   this.formulaInput.text = text;
-    // });
     this.$on('table:select-cell', text => {
       this.formulaInput.text = text;
     });
+  }
 
-    this.$subscribe(state => {
-      this.formulaInput.text = state.currentText;
-    });
+  storeChanged({ currentText = '' }) {
+    this.formulaInput.text = currentText;
   }
 
   onInput(event: Event) {
diff --git a/src/core/ExcelComponent.ts b/src/core/ExcelComponent.ts
index 3356336..bce3712 100644
--- a/src/core/ExcelComponent.ts
+++ b/src/core/ExcelComponent.ts
@@ -1,4 +1,4 @@
-import { ActionType, StateType, SubscribeType } from '../redux/types';
+import { ActionType, SubscribeType } from '../redux/types';
 import { Store } from './createStore';
 import { DomListener } from './DomListener';
 import { Emitter } from './Emitter';
@@ -6,6 +6,7 @@ import { Emitter } from './Emitter';
 interface ExcelComponentClass {
   toHTML: () => string;
   prepare: () => void;
+  storeChanged?: (args: any) => void;
 }
 
 type OptionsType = {
@@ -13,13 +14,15 @@ type OptionsType = {
   name: string;
   emitter?: Emitter;
   store: Store;
+  subscribe: string[],
 };
 
-export class ExcelComponent extends DomListener implements ExcelComponentClass {
+export abstract class ExcelComponent extends DomListener implements ExcelComponentClass {
   name: string;
   emitter: Emitter;
   store: Store;
   storeSub: SubscribeType;
+  subscribe: string[];
   private unsubscribers: ((args?: any) => any)[];
 
   constructor($root: any, options: OptionsType) {
@@ -27,6 +30,8 @@ export class ExcelComponent extends DomListener implements ExcelComponentClass {
     this.name = options?.name;
     this.emitter = options?.emitter;
     this.store = options?.store;
+    this.subscribe = options?.subscribe;
+
     this.unsubscribers = [];
     this.prepare();
   }
@@ -52,8 +57,12 @@ export class ExcelComponent extends DomListener implements ExcelComponentClass {
     this.store.dispatch(action);
   }
 
-  $subscribe(fn: (state?: StateType) => void) {
-    this.storeSub = this.store.subscribe(fn);
+  storeChanged(args?: any) {
+    console.log('CHANGE STORE: ', args);
+  }
+
+  isWatching(key: string) {
+    return this.subscribe?.includes(key);
   }
 
   init() {
diff --git a/src/core/StoreSubscriber.ts b/src/core/StoreSubscriber.ts
new file mode 100644
index 0000000..408b388
--- /dev/null
+++ b/src/core/StoreSubscriber.ts
@@ -0,0 +1,35 @@
+import { StateType } from '../redux/types';
+import { Store } from './createStore';
+import { isEqual } from './utils';
+
+export class StoreSubscriber {
+  sub: any;
+  prevState: StateType;
+
+  constructor(private store: Store) {
+    this.sub = null;
+    this.prevState = {};
+  }
+
+  subscribeComponents(components: any[]) {
+    this.prevState = this.store.getState();
+
+    this.sub = this.store.subscribe((state: StateType) => {
+      Object.keys(state).forEach(key => {
+        if (!isEqual(this.prevState[key], state[key])) {
+          components.forEach(component => {
+            if (component.isWatching(key)) {
+              const changes = { [key]: state[key] };
+              component.storeChanged(changes);
+            }
+          });
+        }
+      });
+      this.prevState = this.store.getState();
+    });
+  }
+
+  unsubscribeFromStore() {
+    this.sub.unsubscribe();
+  }
+}
diff --git a/src/core/createStore.ts b/src/core/createStore.ts
index 022f2c0..f8de14e 100644
--- a/src/core/createStore.ts
+++ b/src/core/createStore.ts
@@ -37,6 +37,6 @@ export class Store {
   }
 
   getState() {
-    return this.state;
+    return JSON.parse(JSON.stringify(this.state));
   }
 }
diff --git a/src/core/utils.ts b/src/core/utils.ts
index f560953..2e37cca 100644
--- a/src/core/utils.ts
+++ b/src/core/utils.ts
@@ -11,3 +11,11 @@ export function storage(key: string, data: any = null): any {
 
   return true;
 }
+
+export function isEqual(a: any, b: any) {
+  if (typeof a === 'object' && typeof b === 'object') {
+    return JSON.stringify(a) === JSON.stringify(b);
+  }
+
+  return a === b;
+}