1 files changed, 1 insertions, 1 deletions
diff --git a/build.sbt b/build.sbt
index ec4cda13..e99310f2 100644
--- a/build.sbt
+++ b/build.sbt
@@ -16,7 +16,7 @@ lazy val commonSettings = Seq (
   organization := "edu.berkeley.cs",
   version := "3.5-SNAPSHOT",
   autoAPIMappings := true,
-  scalaVersion := "2.13.6",
+  scalaVersion := "2.12.15",
   crossScalaVersions := Seq("2.13.6", "2.12.15"),
   scalacOptions := Seq("-deprecation", "-feature"),
   libraryDependencies += "org.scala-lang" % "scala-reflect" % scalaVersion.value,