diff --git a/tasty/src/dotty/tools/tasty/TastyFormat.scala b/tasty/src/dotty/tools/tasty/TastyFormat.scala
index f4f72a6e7e19..2712e5205cc4 100644
--- a/tasty/src/dotty/tools/tasty/TastyFormat.scala
+++ b/tasty/src/dotty/tools/tasty/TastyFormat.scala
@@ -290,7 +290,7 @@ object TastyFormat {
    *  compatibility, but remains backwards compatible, with all
    *  preceeding `MinorVersion`.
    */
-  final val MinorVersion: Int = 2
+  final val MinorVersion: Int = 1
 
   /** Natural Number. The `ExperimentalVersion` allows for
    *  experimentation with changes to TASTy without committing
@@ -306,7 +306,7 @@ 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 = 1
+  final val ExperimentalVersion: Int = 0
 
   /**This method implements a binary relation (`<:<`) between two TASTy versions.
    *