diff --git a/build.sbt b/build.sbt
index f5035779..c32403ed 100644
--- a/build.sbt
+++ b/build.sbt
@@ -5,8 +5,9 @@ lazy val previousJawnVersion = "0.10.4"
 lazy val stableCrossVersions =
   Seq("2.10.6", "2.11.11", "2.12.2")
 
+// we'll support 2.13.0-M1 soon but not yet
 lazy val allCrossVersions =
-  stableCrossVersions :+ "2.13.0-M1"
+  stableCrossVersions
 
 lazy val benchmarkVersion =
   "2.12.2"