diff --git a/fastapi_utils/guid_type.py b/fastapi_utils/guid_type.py
index 8f0ef822..5e6926fe 100644
--- a/fastapi_utils/guid_type.py
+++ b/fastapi_utils/guid_type.py
@@ -27,6 +27,7 @@ class GUID(UUIDTypeDecorator):
     """
 
     impl = CHAR
+    cache_ok = True
 
     @no_type_check
     def __init__(self, *args, **kwargs):