diff --git a/app/data/compose/docker-compose-mainnet-go-opera.yml b/app/data/compose/docker-compose-mainnet-go-opera.yml
index b95ebaf3..4d798e7b 100644
--- a/app/data/compose/docker-compose-mainnet-go-opera.yml
+++ b/app/data/compose/docker-compose-mainnet-go-opera.yml
@@ -7,10 +7,11 @@ services:
     entrypoint: ["sh", "/docker-entrypoint-scripts.d/start-node.sh"]
     volumes:
       - ../config/mainnet-go-opera/start-node.sh:/docker-entrypoint-scripts.d/start-node.sh
-    network_mode: "host"
+    # network_mode: "host"
     # TODO: ports taken from dockerfile, determine which are needed
     ports:
       - "5050:5050" # p2p port, needed
+      - "5050:5050/udp"
       - "18545:18545" # http rpc port
       - "18546:18546" # websockets rpc port
       #- "18547" # unknown
diff --git a/app/data/config/mainnet-go-opera/start-node.sh b/app/data/config/mainnet-go-opera/start-node.sh
index 4c3ebbd5..7632c730 100644
--- a/app/data/config/mainnet-go-opera/start-node.sh
+++ b/app/data/config/mainnet-go-opera/start-node.sh
@@ -3,5 +3,5 @@
 # download genesis file
 wget https://download.fantom.network/mainnet-109331-no-history.g
 
-./opera --genesis=mainnet-109331-no-history.g --db.preset ldb-1 --syncmode snap --http --http.addr="0.0.0.0" --http.corsdomain="*" --http.api=eth,web3,net,txpool,ftm
+./opera --genesis=mainnet-109331-no-history.g --db.preset ldb-1 --syncmode snap --http --http.addr="0.0.0.0" --http.corsdomain="*" --http.api=eth,web3,net,txpool,ftm --ws --ws.addr="0.0.0.0" --ws.origins="*" --ws.api=eth,web3,net,txpool,ftm --cache 8192
 #tail -f /dev/null
diff --git a/app/data/container-build/cerc-go-opera/build.sh b/app/data/container-build/cerc-go-opera/build.sh
index 51bfe2f6..37e561a4 100755
--- a/app/data/container-build/cerc-go-opera/build.sh
+++ b/app/data/container-build/cerc-go-opera/build.sh
@@ -1,5 +1,12 @@
 #!/usr/bin/env bash
 # Build cerc/go-opera
 source ${CERC_CONTAINER_BASE_DIR}/build-base.sh
-#cp ${CERC_REPO_BASE_DIR}/go-opera/docker/Dockerfile.opera ${CERC_REPO_BASE_DIR}/go-opera/Dockerfile
+
+# Checkout appropriate release; refer to https://docs.fantom.foundation/
+OPERA_TAG=${OPERA_TAG:-release/1.1.2-rc.5}
+git -C ${CERC_REPO_BASE_DIR}/go-opera checkout ${OPERA_TAG}
+
+# Repo's dockerfile gives build error because it's hardcoded for go 1.17; go 1.19 is required
+sed -i 's/FROM golang:1\.[0-9]*-alpine as builder/FROM golang:1.19-alpine as builder/' ${CERC_REPO_BASE_DIR}/go-opera/docker/Dockerfile.opera
+
 docker build -f ${CERC_REPO_BASE_DIR}/go-opera/docker/Dockerfile.opera -t cerc/go-opera:local ${build_command_args} ${CERC_REPO_BASE_DIR}/go-opera