diff --git a/lru_cache/lru_cache.go b/lru_cache/lru_cache.go
index f6c4507..b98af6d 100644
--- a/lru_cache/lru_cache.go
+++ b/lru_cache/lru_cache.go
@@ -126,3 +126,14 @@ func (c *LRUCache) EnlargeCapacity(newCapacity int) error {
 	c.capacity = newCapacity
 	return nil
 }
+
+// UpdateValue just update the value of some cache
+func (c *LRUCache) UpdateValue (key interface{}, value interface{}) bool {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+	if elem, ok := c.cache[key]; ok {
+		elem.Value.(*Pair).value = value
+		return true
+	}
+	return false
+}
\ No newline at end of file
diff --git a/lru_cache/lru_cache_test.go b/lru_cache/lru_cache_test.go
index 06776c6..739e2c3 100644
--- a/lru_cache/lru_cache_test.go
+++ b/lru_cache/lru_cache_test.go
@@ -112,3 +112,11 @@ func TestAddAndKeys(t *testing.T) {
 		t.Errorf("Should have same key length")
 	}
 }
+
+func TestUpdateValue(t *testing.T) {
+	cache := prepareCache()
+	rs := cache.UpdateValue("key6", "")
+	if !rs {
+		t.Errorf("'key6' is not in current cache")
+	}
+}
\ No newline at end of file