diff --git a/pkg/vm/interop.go b/pkg/vm/interop.go
index f0dd90f35..2cc188bc6 100644
--- a/pkg/vm/interop.go
+++ b/pkg/vm/interop.go
@@ -40,9 +40,9 @@ var defaultVMInterops = []interopIDFuncPrice{
 	{emit.InteropNameToID([]byte("System.Binary.Serialize")),
 		InteropFuncPrice{Func: RuntimeSerialize, Price: 100000}},
 	{emit.InteropNameToID([]byte("System.Runtime.Log")),
-		InteropFuncPrice{Func: runtimeLog, Price: 1}},
+		InteropFuncPrice{Func: runtimeLog, Price: 1000000, RequiredFlags: smartcontract.AllowNotify}},
 	{emit.InteropNameToID([]byte("System.Runtime.Notify")),
-		InteropFuncPrice{Func: runtimeNotify, Price: 1}},
+		InteropFuncPrice{Func: runtimeNotify, Price: 1000000, RequiredFlags: smartcontract.AllowNotify}},
 	{emit.InteropNameToID([]byte("System.Enumerator.Create")),
 		InteropFuncPrice{Func: EnumeratorCreate, Price: 400}},
 	{emit.InteropNameToID([]byte("System.Enumerator.Next")),