diff --git a/.env.sample b/.env.sample
index 502954c..0e6211a 100644
--- a/.env.sample
+++ b/.env.sample
@@ -26,6 +26,7 @@
 #LIGHTHOUSE_PORT_P2P=
 
 # Checkpoint sync url used by lighthouse to fast sync.
+# See available checkpoint sync urls here https://eth-clients.github.io/checkpoint-sync-endpoints/#mainnet.
 #LIGHTHOUSE_CHECKPOINT_SYNC_URL=
 
 ######### Lodestar Config #########
@@ -72,7 +73,8 @@
 # MEV-Boost docker container image version, e.g. `latest` or `1.5.0`.
 #MEVBOOST_VERSION=
 
-# Comma separated list of MEV-Boost relays. You can choose public relays from https://research.lido.fi/t/lido-on-ethereum-call-for-relay-providers/2844.
+# Comma separated list of MEV-Boost relays.
+# You can choose public relays from https://github.com/eth-educators/ethstaker-guides/blob/main/MEV-relay-list.md.
 #MEVBOOST_RELAYS=
 
 ######### Monitoring Config #########
diff --git a/docker-compose.yml b/docker-compose.yml
index bfd1ace..ab51078 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -18,7 +18,7 @@ services:
       - ${GETH_PORT_P2P:-30303}:30303/tcp # P2P TCP
       - ${GETH_PORT_P2P:-30303}:30303/udp # P2P UDP
     command: |
-      --${NETWORK:-goerli}
+      --${NETWORK:-mainnet}
       --http
       --http.addr=0.0.0.0
       --http.port=8545
@@ -51,8 +51,8 @@ services:
       - ${LIGHTHOUSE_PORT_P2P:-9000}:9000/udp   # P2P UDP
     command: |
       lighthouse bn
-      --network=${NETWORK:-goerli}
-      --checkpoint-sync-url=${LIGHTHOUSE_CHECKPOINT_SYNC_URL:-https://checkpoint-sync.goerli.ethpandaops.io}
+      --network=${NETWORK:-mainnet}
+      --checkpoint-sync-url=${LIGHTHOUSE_CHECKPOINT_SYNC_URL:-https://mainnet.checkpoint.sigp.io}
       --execution-endpoint=http://geth:8551
       --execution-jwt=/opt/jwt/jwt.hex
       --datadir=/opt/app/beacon/
@@ -113,7 +113,7 @@ services:
       - ${LODESTAR_PORT_METRICS:-5064}:5064 # Metrics
     environment:
       BEACON_NODE_ADDRESS: http://charon:3600
-      NETWORK: ${NETWORK:-goerli}
+      NETWORK: ${NETWORK:-mainnet}
       BUILDER_API_ENABLED: ${BUILDER_API_ENABLED:-false}
     volumes:
       - ./lodestar/run.sh:/opt/lodestar/run.sh
@@ -129,11 +129,11 @@ services:
   mev-boost:
     image: flashbots/mev-boost:${MEVBOOST_VERSION:-1.5.0}
     command: |
-      -${NETWORK:-goerli} 
+      -${NETWORK:-mainnet} 
       -loglevel=debug
       -addr=0.0.0.0:18550
       -relay-check
-      -relays=${MEVBOOST_RELAYS:-"https://0xafa4c6985aa049fb79dd37010438cfebeb0f2bd42b115b89dd678dab0670c1de38da0c4e9138c9290a398ecd9a0b3110@boost-relay-goerli.flashbots.net"}
+      -relays=${MEVBOOST_RELAYS:-"https://0xac6e77dfe25ecd6110b8e780608cce0dab71fdd5ebea22a16c0205200f2f8e2e3ad3b71d3499c54ad14d6c21b41a37ae@boost-relay.flashbots.net"}
     restart: unless-stopped
 
   #                        _ _             _