diff --git a/akka-actor-typed/src/main/mima-filters/2.6.4.backwards.excludes/reliable-delivery.excludes b/akka-actor-typed/src/main/mima-filters/2.6.4.backwards.excludes/reliable-delivery.excludes
new file mode 100644
index 0000000000..e59db0fb17
--- /dev/null
+++ b/akka-actor-typed/src/main/mima-filters/2.6.4.backwards.excludes/reliable-delivery.excludes
@@ -0,0 +1,2 @@
+# Changes to internals of reliable delivery
+ProblemFilters.exclude[Problem]("akka.actor.typed.delivery.internal.*")
diff --git a/akka-stream/src/main/mima-filters/2.6.4.backwards.excludes/28272-source-queue.excludes b/akka-stream/src/main/mima-filters/2.6.4.backwards.excludes/28272-source-queue.excludes
new file mode 100644
index 0000000000..39fecc7479
--- /dev/null
+++ b/akka-stream/src/main/mima-filters/2.6.4.backwards.excludes/28272-source-queue.excludes
@@ -0,0 +1,2 @@
+# #28272 Source.queue
+ProblemFilters.exclude[DirectMissingMethodProblem]("akka.stream.impl.QueueSource.this")
diff --git a/project/MiMa.scala b/project/MiMa.scala
index 9bd593e206..fb19c4d2b9 100644
--- a/project/MiMa.scala
+++ b/project/MiMa.scala
@@ -13,7 +13,7 @@ import com.typesafe.tools.mima.plugin.MimaPlugin.autoImport._
 object MiMa extends AutoPlugin {
 
   private val latestPatchOf25 = 29
-  private val latestPatchOf26 = 3
+  private val latestPatchOf26 = 4
 
   override def requires = MimaPlugin
   override def trigger = allRequirements