diff --git a/config/protocol.testnet.yml b/config/protocol.testnet.yml
index a57cda008..b061181f2 100644
--- a/config/protocol.testnet.yml
+++ b/config/protocol.testnet.yml
@@ -1,6 +1,9 @@
 ProtocolConfiguration:
-  Magic: 877933390
+  Magic: 894710606
+  MaxBlockSize: 2097152
+  MaxBlockSystemFee: 150000000000
   MaxTraceableBlocks: 2102400
+  MaxTransactionsPerBlock: 5000
   InitialGASSupply: 52000000
   SecondsPerBlock: 15
   MemPoolSize: 50000
@@ -28,11 +31,11 @@ ProtocolConfiguration:
   - 03184b018d6b2bc093e535519732b3fd3f7551c8cffaf4621dd5a0b89482ca66c9
   ValidatorsCount: 7
   SeedList:
-  - seed1t4.neo.org:20333
-  - seed2t4.neo.org:20333
-  - seed3t4.neo.org:20333
-  - seed4t4.neo.org:20333
-  - seed5t4.neo.org:20333
+  - seed1t5.neo.org:20333
+  - seed2t5.neo.org:20333
+  - seed3t5.neo.org:20333
+  - seed4t5.neo.org:20333
+  - seed5t5.neo.org:20333
   VerifyBlocks: true
   VerifyTransactions: false
   P2PSigExtensions: false
diff --git a/pkg/config/netmode/netmode.go b/pkg/config/netmode/netmode.go
index e60e8f5a3..1257f3eab 100644
--- a/pkg/config/netmode/netmode.go
+++ b/pkg/config/netmode/netmode.go
@@ -6,7 +6,7 @@ const (
 	// MainNet contains magic code used in the NEO main official network.
 	MainNet Magic = 0x334f454e // NEO3
 	// TestNet contains magic code used in the NEO testing network.
-	TestNet Magic = 0x3454334e // N3T4
+	TestNet Magic = 0x3554334e // N3T5
 	// PrivNet contains magic code usually used for NEO private networks.
 	PrivNet Magic = 56753 // docker privnet
 	// UnitTestNet is a stub magic code used for testing purposes.