diff --git a/apps/api/src/orders/order-repository.ts b/apps/api/src/orders/order-repository.ts
index 5a904e1..20bc84c 100644
--- a/apps/api/src/orders/order-repository.ts
+++ b/apps/api/src/orders/order-repository.ts
@@ -39,9 +39,9 @@ export async function listOrderSummaries(context: DatabaseContext, query?: strin
 
   const filters = search
     ? or(
-        sql`instr(${orders.orderNumber}, ${search}) > 0`,
-        sql`instr(${users.name}, ${search}) > 0`,
-        sql`instr(${users.email}, ${search}) > 0`
+        sql`instr(lower(${orders.orderNumber}), lower(${search})) > 0`,
+        sql`instr(lower(${users.name}), lower(${search})) > 0`,
+        sql`instr(lower(${users.email}), lower(${search})) > 0`
       )
     : undefined;