diff --git a/project/Build.scala b/project/Build.scala
index 9babd3c9c679..4b347db088a9 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -80,9 +80,9 @@ object DottyJSPlugin extends AutoPlugin {
 object Build {
   import ScaladocConfigs._
 
-  val referenceVersion = "3.2.2"
+  val referenceVersion = "3.3.0-RC1"
 
-  val baseVersion = "3.3.0-RC1"
+  val baseVersion = "3.3.1-RC1"
 
   // Versions used by the vscode extension to create a new project
   // This should be the latest published releases.
diff --git a/project/MiMaFilters.scala b/project/MiMaFilters.scala
index 689a4b8f1614..63ce926355bb 100644
--- a/project/MiMaFilters.scala
+++ b/project/MiMaFilters.scala
@@ -5,10 +5,29 @@ object MiMaFilters {
   val Library: Seq[ProblemFilter] = Seq(
     ProblemFilters.exclude[DirectMissingMethodProblem]("scala.caps.unsafeBox"),
     ProblemFilters.exclude[DirectMissingMethodProblem]("scala.caps.unsafeUnbox"),
+    ProblemFilters.exclude[DirectMissingMethodProblem]("scala.CanEqual.canEqualMap"),
+    ProblemFilters.exclude[MissingClassProblem]("scala.caps$Pure"),
+    ProblemFilters.exclude[MissingClassProblem]("scala.caps$unsafe$"),
+    ProblemFilters.exclude[MissingFieldProblem]("scala.runtime.stdLibPatches.language.3.3-migration"),
+    ProblemFilters.exclude[MissingFieldProblem]("scala.runtime.stdLibPatches.language.3.3"),
+    ProblemFilters.exclude[MissingClassProblem]("scala.runtime.stdLibPatches.language$3$u002E3$"),
+    ProblemFilters.exclude[MissingClassProblem]("scala.runtime.stdLibPatches.language$3$u002E3$minusmigration$"),
+    ProblemFilters.exclude[MissingFieldProblem]("scala.runtime.stdLibPatches.language#experimental.into"),
+    ProblemFilters.exclude[MissingClassProblem]("scala.runtime.stdLibPatches.language$experimental$into$"),
+    ProblemFilters.exclude[MissingClassProblem]("scala.util.boundary"),
+    ProblemFilters.exclude[MissingClassProblem]("scala.util.boundary$"),
+    ProblemFilters.exclude[MissingClassProblem]("scala.util.boundary$Break"),
+    ProblemFilters.exclude[MissingClassProblem]("scala.util.boundary$Label")
+  )
+  val TastyCore: Seq[ProblemFilter] = Seq(
+    ProblemFilters.exclude[DirectMissingMethodProblem]("dotty.tools.tasty.TastyBuffer.reset"),
+    ProblemFilters.exclude[DirectMissingMethodProblem]("dotty.tools.tasty.TastyFormat.APPLYsigpoly"),
+    ProblemFilters.exclude[DirectMissingMethodProblem]("dotty.tools.tasty.TastyHash.pjwHash64"),
+    ProblemFilters.exclude[DirectMissingMethodProblem]("dotty.tools.tasty.util.Util.dble")
   )
-  val TastyCore: Seq[ProblemFilter] = Seq()
   val Interfaces: Seq[ProblemFilter] = Seq(
-    ProblemFilters.exclude[MissingClassProblem]("dotty.tools.dotc.interfaces.DiagnosticRelatedInformation"),
-    ProblemFilters.exclude[ReversedMissingMethodProblem]("dotty.tools.dotc.interfaces.Diagnostic.diagnosticRelatedInformation")
+    ProblemFilters.exclude[ReversedMissingMethodProblem]("dotty.tools.dotc.interfaces.Diagnostic.diagnosticRelatedInformation"),
+    ProblemFilters.exclude[DirectMissingMethodProblem]("dotty.tools.dotc.interfaces.Diagnostic.diagnosticRelatedInformation"),
+    ProblemFilters.exclude[MissingClassProblem]("dotty.tools.dotc.interfaces.DiagnosticRelatedInformation")
   )
 }
diff --git a/tasty/src/dotty/tools/tasty/TastyFormat.scala b/tasty/src/dotty/tools/tasty/TastyFormat.scala
index ded313fb171c..23b74ed1d7c7 100644
--- a/tasty/src/dotty/tools/tasty/TastyFormat.scala
+++ b/tasty/src/dotty/tools/tasty/TastyFormat.scala
@@ -289,7 +289,7 @@ object TastyFormat {
    *  compatibility, but remains backwards compatible, with all
    *  preceeding `MinorVersion`.
    */
-  final val MinorVersion: Int = 2
+  final val MinorVersion: Int = 4
 
   /** Natural Number. The `ExperimentalVersion` allows for
    *  experimentation with changes to TASTy without committing
@@ -305,7 +305,7 @@ object TastyFormat {
    *  is able to read final TASTy documents if the file's
    *  `MinorVersion` is strictly less than the current value.
    */
-  final val ExperimentalVersion: Int = 0
+  final val ExperimentalVersion: Int = 1
 
   /**This method implements a binary relation (`<:<`) between two TASTy versions.
    *