diff --git a/build.sbt b/build.sbt
index 5a6490b..99de585 100644
--- a/build.sbt
+++ b/build.sbt
@@ -48,7 +48,7 @@ lazy val fullCrossVersionSettings = Seq(
     // NOTE: SBT 1.x provides cross-version support for Scala sources
     // (https://www.scala-sbt.org/1.x/docs/Cross-Build.html#Scala-version+specific+source+directory).
     // Unfortunately, it only includes directories like "scala_2.12" or "scala_2.13",
-    // not "scala_2.12.19" or "scala_2.13.14" that we need.
+    // not "scala_2.12.20" or "scala_2.13.14" that we need.
     // That's why we have to work around here.
     val base = (Compile / sourceDirectory).value
     val versionDir = scalaVersion.value.replaceAll("-.*", "")
diff --git a/project/BuildPlugin.scala b/project/BuildPlugin.scala
index 2f240af..9635aad 100644
--- a/project/BuildPlugin.scala
+++ b/project/BuildPlugin.scala
@@ -258,7 +258,7 @@ object BuildImplementation {
     Keys.organization := "ch.epfl.scala",
     Keys.resolvers += Resolver.jcenterRepo,
     Keys.updateOptions := Keys.updateOptions.value.withCachedResolution(true),
-    Keys.scalaVersion := "2.12.19",
+    Keys.scalaVersion := "2.12.20",
     sbt.nio.Keys.watchTriggeredMessage := Watch.clearScreenOnTrigger,
     BuildKeys.enableStatistics := true,
     BuildKeys.showScalaInstances := BuildDefaults.showScalaInstances.value