diff --git a/google-cloud-pub-sub-grpc/src/main/scala/akka/stream/alpakka/googlecloud/pubsub/grpc/impl/DeprecatedCredentials.scala b/google-cloud-pub-sub-grpc/src/main/scala/akka/stream/alpakka/googlecloud/pubsub/grpc/impl/DeprecatedCredentials.scala
index 6944f10767..b453067c6f 100644
--- a/google-cloud-pub-sub-grpc/src/main/scala/akka/stream/alpakka/googlecloud/pubsub/grpc/impl/DeprecatedCredentials.scala
+++ b/google-cloud-pub-sub-grpc/src/main/scala/akka/stream/alpakka/googlecloud/pubsub/grpc/impl/DeprecatedCredentials.scala
@@ -20,5 +20,6 @@ private[grpc] final case class DeprecatedCredentials(underlying: CallCredentials
                                     applier: CallCredentials.MetadataApplier): Unit =
     underlying.applyRequestMetadata(requestInfo, appExecutor, applier)
 
+  @deprecated("unstable API", "7.0.0")
   override def thisUsesUnstableApi(): Unit = underlying.thisUsesUnstableApi()
 }
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 4074d28904..296f70d3d6 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -10,7 +10,7 @@ object Dependencies {
   val Scala2Versions = Seq(Scala213)
   val ScalaVersions = Dependencies.Scala2Versions :+ Dependencies.Scala3
 
-  val AkkaVersion = "2.9.0-M3"
+  val AkkaVersion = "2.9.0"
   val AkkaBinaryVersion = "2.9"
 
   val InfluxDBJavaVersion = "2.15"
@@ -20,9 +20,9 @@ object Dependencies {
   // Sync with plugins.sbt
   val AkkaGrpcBinaryVersion = "2.4"
   // sync ignore prefix in scripts/link-validator.conf#L30
-  val AkkaHttpVersion = "10.6.0-M2"
+  val AkkaHttpVersion = "10.6.0"
   val AkkaHttpBinaryVersion = "10.6"
-  val AlpakkaKafkaVersion = "5.0.0-M1"
+  val AlpakkaKafkaVersion = "5.0.0"
   val ScalaTestVersion = "3.2.15"
   val TestContainersScalaTestVersion = "0.40.3" // pulls Testcontainers 1.16.2
   val mockitoVersion = "4.8.1" // check even https://github.com/scalatest/scalatestplus-mockito/releases
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 8a2a5b2d5f..00acd01729 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -16,6 +16,6 @@ addSbtPlugin("com.github.sbt" % "sbt-unidoc" % "0.5.0")
 addSbtPlugin("com.thoughtworks.sbt-api-mappings" % "sbt-api-mappings" % "3.0.2")
 addSbtPlugin("com.github.sbt" % "sbt-site-paradox" % "1.5.0")
 // Akka gRPC -- sync with version in Dependencies.scala:22
-addSbtPlugin("com.lightbend.akka.grpc" % "sbt-akka-grpc" % "2.4.0-M1")
+addSbtPlugin("com.lightbend.akka.grpc" % "sbt-akka-grpc" % "2.4.0")
 // templating
 addSbtPlugin("io.spray" % "sbt-boilerplate" % "0.6.1")