diff --git a/src/core/observer.ts b/src/core/observer.ts
index 51585ccd..39afdbb6 100644
--- a/src/core/observer.ts
+++ b/src/core/observer.ts
@@ -46,10 +46,6 @@ export class Observer {
     const metadata = this.weakMap.get(value);
     return metadata ? metadata.rev : 0;
   }
-  deepRevNumber(value): number {
-    const metadata = this.weakMap.get(value);
-    return metadata ? metadata.deepRev : 0;
-  }
 
   _observe(value, parent) {
     var self = this;
@@ -87,7 +83,6 @@ export class Observer {
       value,
       proxy,
       rev: this.rev,
-      deepRev: this.rev,
       parent
     };
 
@@ -99,11 +94,10 @@ export class Observer {
   _updateRevNumber(target: any) {
     this.rev++;
     let metadata = this.weakMap.get(target);
-    metadata.rev!++;
     let parent = target;
     do {
       metadata = this.weakMap.get(parent);
-      metadata.deepRev++;
+      metadata.rev++;
     } while ((parent = metadata.parent) && parent !== target);
   }
 }
diff --git a/src/store.ts b/src/store.ts
index 484cefdf..3f94fbc6 100644
--- a/src/store.ts
+++ b/src/store.ts
@@ -85,7 +85,7 @@ export function useStore(selector, options: SelectorOptions = {}): any {
   const component: Component<any, any> = Component.current!;
   const store = options.store || (component.env.store as Store);
   let result = selector(store.state, component.props);
-  const hashFn = store.observer.deepRevNumber.bind(store.observer);
+  const hashFn = store.observer.revNumber.bind(store.observer);
   let revNumber = hashFn(result) || result;
   const isEqual = options.isEqual || isStrictEqual;
   if (!store.updateFunctions[component.__owl__.id]) {
diff --git a/tests/core/observer.test.ts b/tests/core/observer.test.ts
index 3e7557b9..9ecc0f8d 100644
--- a/tests/core/observer.test.ts
+++ b/tests/core/observer.test.ts
@@ -8,13 +8,11 @@ describe("observer", () => {
 
     expect(typeof obj).toBe("object");
     expect(observer.revNumber(obj)).toBe(1);
-    expect(observer.deepRevNumber(obj)).toBe(1);
     expect(observer.rev).toBe(1);
 
     const obj2: any = observer.observe({ a: 1 });
     expect(observer.revNumber(obj2)).toBe(1);
     expect(observer.revNumber(obj)).toBe(1);
-    expect(observer.deepRevNumber(obj)).toBe(1);
     expect(observer.rev).toBe(1);
 
     obj2.a = 2;
@@ -33,23 +31,19 @@ describe("observer", () => {
     const obj: any = observer.observe({ a: null, b: undefined });
 
     expect(observer.revNumber(obj)).toBe(1);
-    expect(observer.deepRevNumber(obj)).toBe(1);
     expect(observer.rev).toBe(1);
 
     obj.a = 3;
     expect(observer.revNumber(obj)).toBe(2);
-    expect(observer.deepRevNumber(obj)).toBe(2);
     expect(observer.rev).toBe(2);
 
     obj.b = 5;
     expect(observer.revNumber(obj)).toBe(3);
-    expect(observer.deepRevNumber(obj)).toBe(3);
     expect(observer.rev).toBe(3);
 
     obj.a = null;
     obj.b = undefined;
     expect(observer.revNumber(obj)).toBe(5);
-    expect(observer.deepRevNumber(obj)).toBe(5);
     expect(observer.rev).toBe(5);
     expect(obj).toEqual({
       a: null,
@@ -63,7 +57,6 @@ describe("observer", () => {
     const obj: any = observer.observe({ date });
 
     expect(observer.revNumber(obj)).toBe(1);
-    expect(observer.deepRevNumber(obj)).toBe(1);
     expect(observer.rev).toBe(1);
     expect(typeof obj.date.getFullYear()).toBe("number");
     expect(obj.date).toBe(date);
@@ -71,7 +64,6 @@ describe("observer", () => {
     obj.date = new Date();
 
     expect(observer.revNumber(obj)).toBe(2);
-    expect(observer.deepRevNumber(obj)).toBe(2);
     expect(observer.rev).toBe(2);
     expect(obj.date).not.toBe(date);
   });
@@ -82,14 +74,11 @@ describe("observer", () => {
 
     expect(Array.isArray(obj.arr)).toBe(true);
     expect(observer.revNumber(obj.arr)).toBe(1);
-    expect(observer.deepRevNumber(obj.arr)).toBe(1);
     expect(observer.rev).toBe(1);
 
     obj.arr[0] = "nope";
     expect(observer.revNumber(obj.arr)).toBe(2);
-    expect(observer.deepRevNumber(obj.arr)).toBe(2);
-    expect(observer.revNumber(obj)).toBe(1);
-    expect(observer.deepRevNumber(obj)).toBe(2);
+    expect(observer.revNumber(obj)).toBe(2);
     expect(observer.rev).toBe(2);
   });
 
@@ -98,24 +87,20 @@ describe("observer", () => {
     const obj: any = observer.observe({ a: 1 });
 
     expect(observer.revNumber(obj)).toBe(1);
-    expect(observer.deepRevNumber(obj)).toBe(1);
     expect(observer.rev).toBe(1);
 
     obj.a = 2;
 
     expect(observer.revNumber(obj)).toBe(2);
-    expect(observer.deepRevNumber(obj)).toBe(2);
     expect(observer.rev).toBe(2);
 
     // same value again
     obj.a = 2;
     expect(observer.revNumber(obj)).toBe(2);
-    expect(observer.deepRevNumber(obj)).toBe(2);
     expect(observer.rev).toBe(2);
 
     obj.a = 3;
     expect(observer.revNumber(obj)).toBe(3);
-    expect(observer.deepRevNumber(obj)).toBe(3);
     expect(observer.rev).toBe(3);
   });
 
@@ -126,19 +111,16 @@ describe("observer", () => {
     expect(Array.isArray(arr)).toBe(true);
     expect(arr.length).toBe(0);
     expect(observer.revNumber(arr)).toBe(1);
-    expect(observer.deepRevNumber(arr)).toBe(1);
     expect(observer.rev).toBe(1);
 
     arr.push(1);
     expect(observer.revNumber(arr)).toBe(2);
-    expect(observer.deepRevNumber(arr)).toBe(2);
     expect(observer.rev).toBe(2);
     expect(arr.length).toBe(1);
     expect(arr).toEqual([1]);
 
     arr.splice(1, 0, "hey");
     expect(observer.revNumber(arr)).toBe(3);
-    expect(observer.deepRevNumber(arr)).toBe(3);
     expect(observer.rev).toBe(3);
     expect(arr).toEqual([1, "hey"]);
     expect(arr.length).toBe(2);
@@ -146,7 +128,6 @@ describe("observer", () => {
     arr.unshift("lindemans");
     //it generates 3 primitive operations
     expect(observer.revNumber(arr)).toBe(6);
-    expect(observer.deepRevNumber(arr)).toBe(6);
     expect(observer.rev).toBe(6);
     expect(arr).toEqual(["lindemans", 1, "hey"]);
     expect(arr.length).toBe(3);
@@ -154,21 +135,18 @@ describe("observer", () => {
     arr.reverse();
     //it generates 2 primitive operations
     expect(observer.revNumber(arr)).toBe(8);
-    expect(observer.deepRevNumber(arr)).toBe(8);
     expect(observer.rev).toBe(8);
     expect(arr).toEqual(["hey", 1, "lindemans"]);
     expect(arr.length).toBe(3);
 
     arr.pop(); // one set, one delete
     expect(observer.revNumber(arr)).toBe(10);
-    expect(observer.deepRevNumber(arr)).toBe(10);
     expect(observer.rev).toBe(10);
     expect(arr).toEqual(["hey", 1]);
     expect(arr.length).toBe(2);
 
     arr.shift(); // 2 sets, 1 delete
     expect(observer.revNumber(arr)).toBe(13);
-    expect(observer.deepRevNumber(arr)).toBe(13);
     expect(observer.rev).toBe(13);
     expect(arr).toEqual([1]);
     expect(arr.length).toBe(1);
@@ -187,8 +165,7 @@ describe("observer", () => {
     arr[0].kriek = 6;
 
     expect(observer.rev).toBe(3);
-    expect(observer.revNumber(arr)).toBe(2);
-    expect(observer.deepRevNumber(arr)).toBe(3);
+    expect(observer.revNumber(arr)).toBe(3);
     expect(observer.revNumber(arr[0])).toBe(3);
   });
 
@@ -238,7 +215,6 @@ describe("observer", () => {
 
     expect(observer.rev).toBe(1);
     expect(observer.revNumber(state)).toBe(1);
-    expect(observer.deepRevNumber(state)).toBe(1);
     expect(observer.notifyCB).toBeCalledTimes(0);
 
     state[1] = "b";
@@ -247,7 +223,6 @@ describe("observer", () => {
 
     expect(observer.rev).toBe(2);
     expect(observer.revNumber(state)).toBe(2);
-    expect(observer.deepRevNumber(state)).toBe(2);
     expect(observer.notifyCB).toBeCalledTimes(1);
 
     expect(state).toEqual(["a", "b"]);
@@ -259,13 +234,11 @@ describe("observer", () => {
 
     expect(observer.rev).toBe(1);
     expect(observer.revNumber(state.arr)).toBe(1);
-    expect(observer.deepRevNumber(state.arr)).toBe(1);
     expect(state.arr.length).toBe(0);
 
     state.arr.push(1);
     expect(observer.rev).toBe(2);
     expect(observer.revNumber(state.arr)).toBe(2);
-    expect(observer.deepRevNumber(state.arr)).toBe(2);
     expect(state.arr.length).toBe(1);
   });
 
@@ -280,7 +253,7 @@ describe("observer", () => {
 
     state.arr[0].something = 2;
     expect(observer.rev).toBe(2);
-    expect(observer.revNumber(state.arr)).toBe(1);
+    expect(observer.revNumber(state.arr)).toBe(2);
     expect(observer.revNumber(state.arr[0])).toBe(2);
   });
 
@@ -294,7 +267,7 @@ describe("observer", () => {
 
     state.a.b = 2;
     expect(observer.rev).toBe(2);
-    expect(observer.revNumber(state)).toBe(1);
+    expect(observer.revNumber(state)).toBe(2);
     expect(observer.revNumber(state.a)).toBe(2);
   });
 
@@ -312,7 +285,7 @@ describe("observer", () => {
     expect(observer.revNumber(obj.a)).toBe(2);
     obj.a.b = 3;
     expect(observer.rev).toBe(3);
-    expect(observer.revNumber(obj)).toBe(2);
+    expect(observer.revNumber(obj)).toBe(3);
     expect(observer.revNumber(obj.a)).toBe(3);
   });
 
@@ -320,22 +293,18 @@ describe("observer", () => {
     const observer = new Observer();
     const state: any = observer.observe({ o: { a: 1 }, arr: [1], n: 13 });
     expect(observer.revNumber(state)).toBe(1);
-    expect(observer.deepRevNumber(state)).toBe(1);
 
     state.o.a = 2;
     expect(observer.rev).toBe(2);
-    expect(observer.revNumber(state)).toBe(1);
-    expect(observer.deepRevNumber(state)).toBe(2);
+    expect(observer.revNumber(state)).toBe(2);
 
     state.arr.push(2);
     expect(observer.rev).toBe(3);
-    expect(observer.revNumber(state)).toBe(1);
-    expect(observer.deepRevNumber(state)).toBe(3);
+    expect(observer.revNumber(state)).toBe(3);
 
     state.n = 155;
     expect(observer.rev).toBe(4);
-    expect(observer.revNumber(state)).toBe(2);
-    expect(observer.deepRevNumber(state)).toBe(4);
+    expect(observer.revNumber(state)).toBe(4);
   });
 
   test("properly handle already observed state", () => {
@@ -361,18 +330,15 @@ describe("observer", () => {
     const obj: any = observer.observe({});
 
     expect(observer.revNumber(obj)).toBe(1);
-    expect(observer.deepRevNumber(obj)).toBe(1);
     expect(observer.rev).toBe(1);
 
     obj.aku = "always finds annoying problems";
     expect(observer.revNumber(obj)).toBe(2);
-    expect(observer.deepRevNumber(obj)).toBe(2);
     expect(observer.rev).toBe(2);
 
     obj.aku = "always finds good problems";
 
     expect(observer.revNumber(obj)).toBe(3);
-    expect(observer.deepRevNumber(obj)).toBe(3);
     expect(observer.rev).toBe(3);
   });
 
@@ -416,7 +382,7 @@ describe("observer", () => {
     expect(observer.revNumber(obj2)).toBe(1);
 
     obj2.key = 3;
-    expect(observer.revNumber(obj1)).toBe(1);
+    expect(observer.revNumber(obj1)).toBe(2);
     expect(observer.revNumber(obj2)).toBe(2);
   });