diff --git a/src/schema.hpp b/src/schema.hpp
index 87feeaa..145ab07 100644
--- a/src/schema.hpp
+++ b/src/schema.hpp
@@ -27,8 +27,14 @@
     String,
     Decimal,
     Bool,
-    Int,
-    Uint,
+    Int8,
+    Uint8,
+    Int16,
+    Uint16,
+    Int32,
+    Uint32,
+    Int64,
+    Uint64,
     Enum,
     Binary,
     IdentityRef,