diff --git a/finance/src/main/kotlin/net/corda/finance/contracts/asset/cash/selection/CashSelectionH2Impl.kt b/finance/src/main/kotlin/net/corda/finance/contracts/asset/cash/selection/CashSelectionH2Impl.kt
index fb3a84371b..7c18981857 100644
--- a/finance/src/main/kotlin/net/corda/finance/contracts/asset/cash/selection/CashSelectionH2Impl.kt
+++ b/finance/src/main/kotlin/net/corda/finance/contracts/asset/cash/selection/CashSelectionH2Impl.kt
@@ -77,7 +77,7 @@ class CashSelectionH2Impl : CashSelection {
             spendLock.withLock {
                 val statement = services.jdbcSession().createStatement()
                 try {
-                    statement.execute("CALL SET(@t, 0);")
+                    statement.execute("CALL SET(@t, CAST(0 AS BIGINT));")
 
                     // we select spendable states irrespective of lock but prioritised by unlocked ones (Eg. null)
                     // the softLockReserve update will detect whether we try to lock states locked by others
diff --git a/samples/trader-demo/src/main/kotlin/net/corda/traderdemo/TraderDemo.kt b/samples/trader-demo/src/main/kotlin/net/corda/traderdemo/TraderDemo.kt
index 689d3b4e52..abcbc740e5 100644
--- a/samples/trader-demo/src/main/kotlin/net/corda/traderdemo/TraderDemo.kt
+++ b/samples/trader-demo/src/main/kotlin/net/corda/traderdemo/TraderDemo.kt
@@ -44,17 +44,17 @@ private class TraderDemo {
         }
 
         // What happens next depends on the role. The buyer sits around waiting for a trade to start. The seller role
-        // will contact the buyer and actually make something happen.
+        // will contact the buyer and actually make something happen.  We intentionally use large amounts here.
         val role = options.valueOf(roleArg)!!
         if (role == Role.BANK) {
             val bankHost = NetworkHostAndPort("localhost", bankRpcPort)
             CordaRPCClient(bankHost).use("demo", "demo") {
-                TraderDemoClientApi(it.proxy).runIssuer(1100.DOLLARS, buyerName, sellerName)
+                TraderDemoClientApi(it.proxy).runIssuer(1_100_000_000.DOLLARS, buyerName, sellerName)
             }
         } else {
             val sellerHost = NetworkHostAndPort("localhost", sellerRpcPort)
             CordaRPCClient(sellerHost).use("demo", "demo") {
-                TraderDemoClientApi(it.proxy).runSeller(1000.DOLLARS, buyerName)
+                TraderDemoClientApi(it.proxy).runSeller(1_000_000_000.DOLLARS, buyerName)
             }
         }
     }