diff --git a/core/chains/evm/config/toml/defaults/Mantle_Sepolia.toml b/core/chains/evm/config/toml/defaults/Mantle_Goerli.toml
similarity index 93%
rename from core/chains/evm/config/toml/defaults/Mantle_Sepolia.toml
rename to core/chains/evm/config/toml/defaults/Mantle_Goerli.toml
index 404c862a115..e5ab8786258 100644
--- a/core/chains/evm/config/toml/defaults/Mantle_Sepolia.toml
+++ b/core/chains/evm/config/toml/defaults/Mantle_Goerli.toml
@@ -1,4 +1,4 @@
-ChainID = '5003'
+ChainID = '5001'
 FinalityDepth = 200
 LogPollInterval = '2s'
 NoNewHeadsThreshold = '0'