diff --git a/common/eth2_config/src/lib.rs b/common/eth2_config/src/lib.rs
index ed3a5bb199..7ad2a8fe9b 100644
--- a/common/eth2_config/src/lib.rs
+++ b/common/eth2_config/src/lib.rs
@@ -122,7 +122,7 @@ define_net!(spadina, include_spadina_file, "spadina", true);
 
 define_net!(pyrmont, include_pyrmont_file, "pyrmont", true);
 
-define_net!(mainnet, include_mainnet_file, "mainnet", false);
+define_net!(mainnet, include_mainnet_file, "mainnet", true);
 
 define_net!(toledo, include_toledo_file, "toledo", true);
 
diff --git a/common/eth2_testnet_config/.gitignore b/common/eth2_testnet_config/.gitignore
index 6af8cb7fc5..9cf78e1ae3 100644
--- a/common/eth2_testnet_config/.gitignore
+++ b/common/eth2_testnet_config/.gitignore
@@ -3,4 +3,3 @@ schlesi-*
 witti-*
 /altona*
 built_in_testnet_configs/*/genesis.ssz
-!built_in_testnet_configs/mainnet/genesis.ssz
diff --git a/common/eth2_testnet_config/built_in_testnet_configs/mainnet/genesis.ssz b/common/eth2_testnet_config/built_in_testnet_configs/mainnet/genesis.ssz
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/common/eth2_testnet_config/built_in_testnet_configs/mainnet/genesis.ssz.zip b/common/eth2_testnet_config/built_in_testnet_configs/mainnet/genesis.ssz.zip
new file mode 100644
index 0000000000..28405c78f0
Binary files /dev/null and b/common/eth2_testnet_config/built_in_testnet_configs/mainnet/genesis.ssz.zip differ