diff --git a/runtime/drivers/registry.go b/runtime/drivers/registry.go
index dc63ea4691c..f860db0234a 100644
--- a/runtime/drivers/registry.go
+++ b/runtime/drivers/registry.go
@@ -141,7 +141,7 @@ func (i *Instance) Config() (InstanceConfig, error) {
 		StageChanges:                         true,
 		ModelDefaultMaterialize:              false,
 		ModelMaterializeDelaySeconds:         0,
-		ModelConcurrentExecutionLimit:        10,
+		ModelConcurrentExecutionLimit:        1,
 		MetricsApproximateComparisons:        true,
 		MetricsApproximateComparisonsCTE:     false,
 		MetricsApproxComparisonTwoPhaseLimit: 250,