diff --git a/README.md b/README.md
index 67e98647..f3809b7b 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ bind-mounting the runtime state directory (`/serverdir/node`) into your local
 filesystem.
 
 ```bash
-docker run --rm -ti -p80:80 -p5432:5432 -p8544-8547:8544-8547 -v /tmp/eth-runtime-test:/serverdir/node ghcr.io/oasisprotocol/sapphire-localnet:local
+docker run --rm -ti -p5432:5432 -p8544-8548:8544-8548 -v /tmp/eth-runtime-test:/serverdir/node ghcr.io/oasisprotocol/sapphire-localnet:local
 ```
 
 If needed, the `oasis-web3-gateway` or `sapphire-paratime` executables could also be
@@ -46,7 +46,7 @@ the full gateway & paratime stack together.
 For running tests, start the docker network without the gateway, by setting the `OASIS_DOCKER_NO_GATEWAY=yes` environment variable:
 
 ```bash
-docker run --rm -ti -e OASIS_DOCKER_NO_GATEWAY=yes -p80:80 -p5432:5432 -p8544-8547:8544-8547 -v /tmp/eth-runtime-test:/serverdir/node ghcr.io/oasisprotocol/sapphire-localnet:local
+docker run --rm -ti -e OASIS_DOCKER_NO_GATEWAY=yes -p5432:5432 -p8544-8548:8544-8548 -v /tmp/eth-runtime-test:/serverdir/node ghcr.io/oasisprotocol/sapphire-localnet:local
 ```
 
 Once bootstrapped, run the tests:
diff --git a/docker/common/start.sh b/docker/common/start.sh
index fe6bc081..57c6daf7 100755
--- a/docker/common/start.sh
+++ b/docker/common/start.sh
@@ -28,7 +28,7 @@ export OASIS_DOCKER_DEBUG_DISK_AND_CPU_USAGE=${OASIS_DOCKER_DEBUG_DISK_AND_CPU_U
 
 export OASIS_SINGLE_COMPUTE_NODE=${OASIS_SINGLE_COMPUTE_NODE:-1}
 
-export EXPLORER_PORT=${EXPLORER_PORT:-80}
+export EXPLORER_PORT=${EXPLORER_PORT:-8548}
 
 OASIS_WEB3_GATEWAY_VERSION=$(${OASIS_WEB3_GATEWAY_BINARY} -v | head -n1 | cut -d " " -f 3 | sed -r 's/^v//')
 OASIS_CORE_VERSION=$(${OASIS_NODE_BINARY} -v | head -n1 | cut -d " " -f 3 | sed -r 's/^v//')
diff --git a/docker/emerald-localnet/Dockerfile b/docker/emerald-localnet/Dockerfile
index 817abb3f..c338e4c0 100644
--- a/docker/emerald-localnet/Dockerfile
+++ b/docker/emerald-localnet/Dockerfile
@@ -133,8 +133,7 @@ RUN wget --quiet "https://github.com/oasisprotocol/oasis-core/releases/download/
 	&& echo "${VERSION}" > /VERSION \
 	&& strip -S -x ${OASIS_NET_RUNNER_BINARY} ${OASIS_NODE_BINARY} ${OASIS_CLI_BINARY}
 
-# Explorer port.
-EXPOSE 80/tcp
+
 # Envoy proxy port.
 EXPOSE 8544/tcp
 # Web3 gateway http and ws ports.
@@ -142,6 +141,8 @@ EXPOSE 8545/tcp
 EXPOSE 8546/tcp
 # Nexus port.
 EXPOSE 8547/tcp
+# Explorer port.
+EXPOSE 8548/tcp
 
 USER root
 ENTRYPOINT ["/start.sh"]
diff --git a/docker/sapphire-localnet/Dockerfile b/docker/sapphire-localnet/Dockerfile
index 090db986..3d54dd8a 100644
--- a/docker/sapphire-localnet/Dockerfile
+++ b/docker/sapphire-localnet/Dockerfile
@@ -196,8 +196,6 @@ RUN echo "Write VERSION information." \
     && ${OASIS_CLI_BINARY} --version \
     && echo
 
-# Explorer port.
-EXPOSE 80/tcp
 # Envoy proxy port.
 EXPOSE 8544/tcp
 # Web3 gateway http and ws ports.
@@ -205,6 +203,8 @@ EXPOSE 8545/tcp
 EXPOSE 8546/tcp
 # Nexus port.
 EXPOSE 8547/tcp
+# Explorer port.
+EXPOSE 8548/tcp
 
 USER root
 ENTRYPOINT ["/start.sh"]