diff --git a/params/chainspecs/chapel.json b/params/chainspecs/chapel.json
index ee755b44a17..0a1e8fbcf94 100644
--- a/params/chainspecs/chapel.json
+++ b/params/chainspecs/chapel.json
@@ -15,6 +15,7 @@
   "nielsBlock": 1014369,
   "mirrorSyncBlock": 5582500,
   "brunoBlock": 13837000,
+  "eulerBlock": 19203503,
   "terminalBlockHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
   "parlia": {
     "DBPath": "",