diff --git a/Storage/Property.cs b/Storage/Property.cs
index b4d2418..4b5003e 100644
--- a/Storage/Property.cs
+++ b/Storage/Property.cs
@@ -89,9 +89,11 @@ public static string SerializeValue(BacnetValue value, BacnetApplicationTags typ
             case BacnetApplicationTags.BACNET_APPLICATION_TAG_NULL:
                 return value.ToString(); // Modif FC
             case BacnetApplicationTags.BACNET_APPLICATION_TAG_REAL:
-                return ((float)value.Value).ToString(CultureInfo.InvariantCulture);
+                return float.Parse(value.Value.ToString()).ToString(CultureInfo.InvariantCulture);
             case BacnetApplicationTags.BACNET_APPLICATION_TAG_DOUBLE:
-                return ((double)value.Value).ToString(CultureInfo.InvariantCulture);
+                return float.Parse(value.Value.ToString()).ToString(CultureInfo.InvariantCulture);
+            case BacnetApplicationTags.BACNET_APPLICATION_TAG_UNSIGNED_INT:
+                return uint.Parse(value.Value.ToString()).ToString(CultureInfo.InvariantCulture);
             case BacnetApplicationTags.BACNET_APPLICATION_TAG_OCTET_STRING:
                 return Convert.ToBase64String((byte[])value.Value);
             case BacnetApplicationTags.BACNET_APPLICATION_TAG_CONTEXT_SPECIFIC_DECODED: