diff --git a/source/AirGQL/GraphQL.hs b/source/AirGQL/GraphQL.hs
index b91436b..09248d4 100644
--- a/source/AirGQL/GraphQL.hs
+++ b/source/AirGQL/GraphQL.hs
@@ -798,7 +798,7 @@ sqlDataToGQLValue datatype sqlData = case (datatype, sqlData) of
                 <> "Use a Number (64-bit float) or Text column instead."
   (_, SQLFloat double) -> pure $ Float double
   (_, SQLText text) -> pure $ String text
-  (_, SQLBlob _) -> pure $ String "<BINARY BLOB>"
+  (_, SQLBlob _) -> Left "Cannot encode BLOB directly as gql"
   (_, SQLNull) -> pure Null