diff --git a/src/Database/PostgreSQL.purs b/src/Database/PostgreSQL.purs
index 0bd7bb2..3f1c642 100644
--- a/src/Database/PostgreSQL.purs
+++ b/src/Database/PostgreSQL.purs
@@ -124,6 +124,9 @@ instance toSQLValueInt :: ToSQLValue Int where
 instance fromSQLValueInt :: FromSQLValue Int where
     fromSQLValue = fromRight <<< runExcept <<< readInt
 
+instance toSQLValueNumber :: ToSQLValue Number where
+    toSQLValue = toForeign
+
 instance toSQLValueString :: ToSQLValue String where
     toSQLValue = toForeign