diff --git a/build.sbt b/build.sbt
index c0e82291..b6c76ff3 100644
--- a/build.sbt
+++ b/build.sbt
@@ -82,7 +82,7 @@ lazy val compat = new MultiScalaCrossProject(
             sharedSourceDir / "scala-2.11_2.12"
         }
       },
-      versionPolicyIntention := Compatibility.BinaryCompatible,
+      versionPolicyIntention := Compatibility.BinaryAndSourceCompatible,
       mimaBinaryIssueFilters ++= {
         import com.typesafe.tools.mima.core._
         import com.typesafe.tools.mima.core.ProblemFilters._