diff --git a/config/prater.chain.yml b/config/prater.chain.yml
index f562805b..e0f4a04a 100644
--- a/config/prater.chain.yml
+++ b/config/prater.chain.yml
@@ -41,7 +41,7 @@ CAPELLA_FORK_VERSION: 0x03001020
 CAPELLA_FORK_EPOCH: 162304
 # Sharding
 DENEB_FORK_VERSION: 0x04001020
-DENEB_FORK_EPOCH: 18446744073709551615
+DENEB_FORK_EPOCH: 231680
 
 # Time parameters
 # ---------------------------------------------------------------