diff --git a/tests/test_utils.py b/tests/test_utils.py
index b7472413..031e086f 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -29,6 +29,14 @@ def test_lru_cache_set_multiple():
     assert cache.lru == ["a"]
 
 
+def test_lru_cache_set_update():
+    cache = LRUCache(capacity=3)
+    cache["a"] = 1
+    cache["a"] = 2
+
+    assert cache["a"] == 2
+
+
 def test_lru_cache_get():
     cache = LRUCache(capacity=3)
     cache["a"] = 1
diff --git a/tinydb/utils.py b/tinydb/utils.py
index 08430ba1..e1f01fbc 100644
--- a/tinydb/utils.py
+++ b/tinydb/utils.py
@@ -99,8 +99,8 @@ def get(self, key: K, default: Optional[D] = None) -> Optional[Union[V, D]]:
 
     def set(self, key: K, value: V):
         if self.cache.get(key):
+            self.cache[key] = value
             self.cache.move_to_end(key, last=True)
-
         else:
             self.cache[key] = value