diff --git a/config/protocol.testnet.yml b/config/protocol.testnet.yml
index 98049425e..ac9c45a3f 100644
--- a/config/protocol.testnet.yml
+++ b/config/protocol.testnet.yml
@@ -1,5 +1,5 @@
 ProtocolConfiguration:
-  Magic: 827601742
+  Magic: 844378958
   MaxTraceableBlocks: 2102400
   SecondsPerBlock: 15
   MemPoolSize: 50000