diff --git a/Dockerfile b/Dockerfile
index cd5c7b21..0e87c205 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,12 @@
-FROM amazoncorretto:21 AS build_stage
+FROM amazoncorretto:23 AS build_stage
 WORKDIR /build
 COPY . .
 RUN ./gradlew --no-daemon clean test shadowJar --stacktrace
 
-FROM amazoncorretto:21
+FROM amazoncorretto:23
 WORKDIR /awg2
 COPY --from=build_stage /build/build/libs/wow-pla.jar wow-pla.jar
-EXPOSE 9000 5006
+EXPOSE 9000 9400
 CMD java \
     -jar \
     --add-opens java.base/java.lang=ALL-UNNAMED \
diff --git a/build.gradle b/build.gradle
index 384cab21..5661d5ec 100644
--- a/build.gradle
+++ b/build.gradle
@@ -44,6 +44,10 @@ dependencies {
     implementation group: 'org.apache.commons', name: 'commons-collections4', version: '4.4'
     implementation 'org.ocpsoft.prettytime:prettytime:5.0.6.Final'
     implementation group: 'org.javatuples', name: 'javatuples', version: '1.2'
+    // metrics
+    implementation group : 'io.prometheus', name : 'prometheus-metrics-core', version : prometheusVersion
+    implementation group : 'io.prometheus', name : 'prometheus-metrics-instrumentation-jvm', version : prometheusVersion
+    implementation group : 'io.prometheus', name : 'prometheus-metrics-exporter-httpserver', version : prometheusVersion
     // test
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.9.3'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.9.3'
diff --git a/frontend/src/constants/filterSchema.ts b/frontend/src/constants/filterSchema.ts
index aeeab5e0..30b47ae8 100644
--- a/frontend/src/constants/filterSchema.ts
+++ b/frontend/src/constants/filterSchema.ts
@@ -23,7 +23,7 @@ export const SEARCH_PARAM_TO_SPEC = {
   'frostmage': 'frostm',
   'armswarrior': 'arms',
   'furywarrior': 'fury',
-  'protectionwarrior': 'protection',
+  'protectionwarrior': 'protectionwarrior',
   'assassinationrogue': 'assassination',
   'outlawrogue': 'outlaw',
   'subtletyrogue': 'subtlety',
@@ -44,7 +44,7 @@ export const SEARCH_PARAM_TO_SPEC = {
   'enhancementshaman': 'enhancement',
   'restorationshaman': 'restosham',
   'holypaladin': 'holypala',
-  'protectionpaladin': 'protection',
+  'protectionpaladin': 'protectionpaladin',
   'retributionpaladin': 'retribution',
   'brewmastermonk': 'brewmaster',
   'windwalkermonk': 'windwalker',
diff --git a/gradle.properties b/gradle.properties
index 6facb706..3d954f34 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,2 +1,3 @@
-vertxVersion=4.4.3
-luceneVersion=9.6.0
\ No newline at end of file
+vertxVersion=4.5.11
+luceneVersion=9.6.0
+prometheusVersion=1.3.5
diff --git a/src/io/github/sammers/pla/Main.java b/src/io/github/sammers/pla/Main.java
index e5a05003..32107b05 100644
--- a/src/io/github/sammers/pla/Main.java
+++ b/src/io/github/sammers/pla/Main.java
@@ -8,6 +8,8 @@
 import io.github.sammers.pla.logic.CharacterCache;
 import io.github.sammers.pla.logic.Ladder;
 import io.github.sammers.pla.logic.Refs;
+import io.prometheus.metrics.exporter.httpserver.HTTPServer;
+import io.prometheus.metrics.instrumentation.jvm.JvmMetrics;
 import io.reactivex.Scheduler;
 import io.reactivex.plugins.RxJavaPlugins;
 import io.reactivex.schedulers.Schedulers;
@@ -19,7 +21,10 @@
 import io.vertx.reactivex.ext.mongo.MongoClient;
 import io.vertx.reactivex.ext.web.client.WebClient;
 import org.ocpsoft.prettytime.PrettyTime;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+import java.io.IOException;
 import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeFormatterBuilder;
 import java.util.Locale;
@@ -35,6 +40,7 @@ public class Main {
 
     public static final Executor VTHREAD_EXECUTOR = Executors.newVirtualThreadPerTaskExecutor();
     public static final Scheduler VTHREAD_SCHEDULER = Schedulers.from(VTHREAD_EXECUTOR);
+    private static final Logger log = LoggerFactory.getLogger(Main.class);
     public static PrettyTime PRETTY_TIME = new PrettyTime(new Locale("en"));
     public static DateTimeFormatter DATA_TIME = ISO_DATE_TIME;
     public static DateTimeFormatter DATA_TIME_WITH_WEEKDAY = new DateTimeFormatterBuilder()
@@ -42,7 +48,12 @@ public class Main {
         .append(ISO_DATE_TIME)
         .toFormatter();
 
-    public static void main(String[] args) {
+    public static void main(String[] args) throws IOException {
+        JvmMetrics.builder().register();
+        HTTPServer.builder()
+            .port(9400)
+            .buildAndStart();
+        log.info("Starting Metrics server on port 9400");
         final Vertx vertx = Vertx.vertx(new VertxOptions()
                 .setBlockedThreadCheckInterval(10)
                 .setBlockedThreadCheckIntervalUnit(TimeUnit.SECONDS)