diff --git a/protocol/app/flags/flags.go b/protocol/app/flags/flags.go
index b166f88352..1a0ad084e1 100644
--- a/protocol/app/flags/flags.go
+++ b/protocol/app/flags/flags.go
@@ -80,7 +80,7 @@ const (
 
 	DefaultVEOracleEnabled = true
 
-	DefaultOptimisticExecutionEnabled       = false
+	DefaultOptimisticExecutionEnabled       = true
 	DefaultOptimisticExecutionTestAbortRate = 0
 )