diff --git a/akka-remote/src/main/mima-filters/2.6.x.backwards.excludes/jdk11-specific-classes.backwards.excludes b/akka-remote/src/main/mima-filters/2.6.x.backwards.excludes/jdk11-specific-classes.backwards.excludes
new file mode 100644
index 0000000000..4db6ba5314
--- /dev/null
+++ b/akka-remote/src/main/mima-filters/2.6.x.backwards.excludes/jdk11-specific-classes.backwards.excludes
@@ -0,0 +1,2 @@
+# Java11+ API's will have to be always filtered until we have these classes in our normal build flow
+ProblemFilters.exclude[MissingClassProblem]("akka.remote.artery.jfr.*")
diff --git a/akka-stream/src/main/mima-filters/2.5.29.backwards.excludes b/akka-stream/src/main/mima-filters/2.5.29.backwards.excludes
new file mode 100644
index 0000000000..5efffaf0dc
--- /dev/null
+++ b/akka-stream/src/main/mima-filters/2.5.29.backwards.excludes
@@ -0,0 +1,5 @@
+# SystemMaterializer was backported from 2.6 to 2.5.29, but unfortunately a
+# binary incompatibility slipped in: it should return Materializer, not
+# ActorMaterializer for 2.5.x to be binary compatible with the feature in
+# 2.6.x.
+ProblemFilters.exclude[IncompatibleResultTypeProblem]("akka.stream.SystemMaterializer.materializer")
diff --git a/akka-stream/src/main/mima-filters/2.6.1.backwards.excludes/28324-jdk9-specific-classes.backwards.excludes b/akka-stream/src/main/mima-filters/2.6.x.backwards.excludes/28324-jdk9-specific-classes.backwards.excludes
similarity index 100%
rename from akka-stream/src/main/mima-filters/2.6.1.backwards.excludes/28324-jdk9-specific-classes.backwards.excludes
rename to akka-stream/src/main/mima-filters/2.6.x.backwards.excludes/28324-jdk9-specific-classes.backwards.excludes
diff --git a/project/MiMa.scala b/project/MiMa.scala
index 304a2015bb..27954d8c85 100644
--- a/project/MiMa.scala
+++ b/project/MiMa.scala
@@ -12,8 +12,8 @@ import com.typesafe.tools.mima.plugin.MimaPlugin.autoImport._
 
 object MiMa extends AutoPlugin {
 
-  private val latestPatchOf25 = 26
-  private val latestPatchOf26 = 1
+  private val latestPatchOf25 = 29
+  private val latestPatchOf26 = 3
 
   override def requires = MimaPlugin
   override def trigger = allRequirements