diff --git a/test/tools/validator-set-submitter/Dockerfile b/test/tools/validator-set-submitter/Dockerfile
index 780cb2b9..84edba6d 100644
--- a/test/tools/validator-set-submitter/Dockerfile
+++ b/test/tools/validator-set-submitter/Dockerfile
@@ -31,7 +31,7 @@ COPY test/utils/ ./utils/
 
 ENV NODE_ENV=production
 
-EXPOSE 9090
+EXPOSE 8080
 
 USER submitter
 
diff --git a/test/tools/validator-set-submitter/README.md b/test/tools/validator-set-submitter/README.md
index 47f2e7c9..1be7c45e 100644
--- a/test/tools/validator-set-submitter/README.md
+++ b/test/tools/validator-set-submitter/README.md
@@ -40,8 +40,8 @@ network_id: "anvil"
 execution_fee: "0.1"
 relayer_fee: "0.2"
 
-# Optional metrics port (default: 9090)
-# metrics_port: 9090
+# Optional metrics port (default: 8080)
+# metrics_port: 8080
 ```
 
 ## Usage
@@ -69,7 +69,7 @@ Private key precedence is: `--submitter-private-key` > `SUBMITTER_PRIVATE_KEY` >
 
 ## Observability
 
-The submitter exposes a Prometheus metrics server on `metrics_port` (default `9090`):
+The submitter exposes a Prometheus metrics server on `metrics_port` (default `8080`):
 
 - `GET /metrics` — Prometheus metrics
 - `GET /healthz` — liveness
diff --git a/test/tools/validator-set-submitter/config.ts b/test/tools/validator-set-submitter/config.ts
index d4337370..d48c9132 100644
--- a/test/tools/validator-set-submitter/config.ts
+++ b/test/tools/validator-set-submitter/config.ts
@@ -106,7 +106,7 @@ function optionalHexString(raw: Record<string, unknown>, key: string): `0x${stri
 
 function resolveMetricsPort(raw: Record<string, unknown>): number {
   const port =
-    raw.metrics_port !== undefined && raw.metrics_port !== null ? Number(raw.metrics_port) : 9090;
+    raw.metrics_port !== undefined && raw.metrics_port !== null ? Number(raw.metrics_port) : 8080;
 
   if (!Number.isFinite(port) || !Number.isInteger(port) || port < 1 || port > 65535) {
     throw new Error(`Invalid metrics port: ${port}. Must be an integer between 1 and 65535.`);
diff --git a/test/tools/validator-set-submitter/config.yml b/test/tools/validator-set-submitter/config.yml
index 18282943..027fcfbe 100644
--- a/test/tools/validator-set-submitter/config.yml
+++ b/test/tools/validator-set-submitter/config.yml
@@ -20,5 +20,5 @@ network_id: "anvil"
 execution_fee: "0.1"
 relayer_fee: "0.2"
 
-# Prometheus metrics server port (default: 9090)
-# metrics_port: 9090
+# Prometheus metrics server port (default: 8080)
+# metrics_port: 8080