diff --git a/docker-compose.yml b/docker-compose.yml
index b7bc9de..57bebd6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,8 +14,7 @@ services:
       - seccomp:unconfined
     environment:
       LOG_LEVEL: info
-      CHECKPOINT_SYNC_URL: ""
-      FEE_RECIPIENT_ADDRESS: ""
+      FEE_RECIPIENT_ADDRESS: "0x0000000000000000000000000000000000000000"
       EXTRA_OPTS: ""
   validator:
     build:
@@ -34,7 +33,7 @@ services:
       GRAFFITI: validating_from_DAppNode
       DOPPELGANGER_PROTECTION: "true"
       EXTRA_OPTS: ""
-      FEE_RECIPIENT_ADDRESS: ""
+      FEE_RECIPIENT_ADDRESS: "0x0000000000000000000000000000000000000000"
       BACKUP_BEACON_NODES: ""
 volumes:
   beacon-data: {}
diff --git a/package_variants/gnosis/docker-compose.yml b/package_variants/gnosis/docker-compose.yml
index e2a15ae..3dc9260 100644
--- a/package_variants/gnosis/docker-compose.yml
+++ b/package_variants/gnosis/docker-compose.yml
@@ -7,9 +7,11 @@ services:
         P2P_PORT: 19012
         QUIC_PORT: 19013
     ports:
-      - 19012:19012/tcp
+      - 19012:19012
       - 19012:19012/udp
       - 19013:19013/udp
+    environment:
+      CHECKPOINT_SYNC_URL: "https://checkpoint-sync-gnosis.dappnode.net"
   validator:
     build:
       args:
diff --git a/package_variants/hoodi/docker-compose.yml b/package_variants/hoodi/docker-compose.yml
index ce7e0dc..d1afa18 100644
--- a/package_variants/hoodi/docker-compose.yml
+++ b/package_variants/hoodi/docker-compose.yml
@@ -7,9 +7,11 @@ services:
         P2P_PORT: 9712
         QUIC_PORT: 9713
     ports:
-      - 9712:9712/tcp
+      - 9712:9712
       - 9712:9712/udp
       - 9713:9713/udp
+    environment:
+      CHECKPOINT_SYNC_URL: "https://checkpoint-sync-hoodi.dappnode.net"
   validator:
     build:
       args:
diff --git a/package_variants/mainnet/docker-compose.yml b/package_variants/mainnet/docker-compose.yml
index cbfdfa6..74caa49 100644
--- a/package_variants/mainnet/docker-compose.yml
+++ b/package_variants/mainnet/docker-compose.yml
@@ -7,9 +7,11 @@ services:
         P2P_PORT: 9112
         QUIC_PORT: 9113
     ports:
-      - 9112:9112/tcp
+      - 9112:9112
       - 9112:9112/udp
       - 9113:9113/udp
+    environment:
+      CHECKPOINT_SYNC_URL: "https://checkpoint-sync.dappnode.net"
   validator:
     build:
       args: