diff --git a/tools/demobench/src/main/kotlin/net/corda/demobench/model/NodeController.kt b/tools/demobench/src/main/kotlin/net/corda/demobench/model/NodeController.kt
index aa25cc163c..05e1bdc3e3 100644
--- a/tools/demobench/src/main/kotlin/net/corda/demobench/model/NodeController.kt
+++ b/tools/demobench/src/main/kotlin/net/corda/demobench/model/NodeController.kt
@@ -146,7 +146,7 @@ class NodeController(check: atRuntime = ::checkExists) : Controller() {
                 notaries = listOf(NotaryInfo(identity, config.nodeConfig.notary!!.validating)),
                 modifiedTime = Instant.now(),
                 maxMessageSize = 10485760,
-                maxTransactionSize = Int.MAX_VALUE,
+                maxTransactionSize = 10485760,
                 epoch = 1,
                 whitelistedContractImplementations = emptyMap()
         ))