diff --git a/build.sbt b/build.sbt
index 0db9dbe666..91aa37fd72 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1105,8 +1105,8 @@ lazy val prometheusMetrics: ProjectMatrix = (projectMatrix in file("metrics/prom
   .settings(
     name := "tapir-prometheus-metrics",
     libraryDependencies ++= Seq(
-      "io.prometheus" % "prometheus-metrics-core" % "1.8.0",
-      "io.prometheus" % "prometheus-metrics-exposition-formats" % "1.8.0",
+      "io.prometheus" % "prometheus-metrics-core" % "1.9.0",
+      "io.prometheus" % "prometheus-metrics-exposition-formats" % "1.9.0",
       scalaTest.value % Test
     )
   )