diff --git a/geth-poa/genesis.json b/geth-poa/genesis.json
index a3653833e99d..4271186285e5 100644
--- a/geth-poa/genesis.json
+++ b/geth-poa/genesis.json
@@ -21,7 +21,7 @@
     },
     "nonce": "0x0",
     "timestamp": "0x18E0A4E0D22",
-    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000d9cd8E5DE6d55f796D980B818D350C0746C25b97788EBABe5c3dD422Ef92Ca6714A69e2eabcE1Ee4f6ba5bca9b489de3a4ac3a57823d5d97d608feb90000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000d9cd8E5DE6d55f796D980B818D350C0746C25b97788EBABe5c3dD422Ef92Ca6714A69e2eabcE1Ee40000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
     "gasLimit": "0x1c9c380",
     "difficulty": "0x1",
     "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",