diff --git a/docs/project/plugins.sbt b/docs/project/plugins.sbt
index befa0bc6..43904b0a 100644
--- a/docs/project/plugins.sbt
+++ b/docs/project/plugins.sbt
@@ -5,5 +5,5 @@ lazy val sbtTwirl = ProjectRef(Path.fileProperty("user.dir").getParentFile, "plu
 resolvers ++= DefaultOptions.resolvers(snapshot = true)
 
 addSbtPlugin("com.typesafe.play" % "play-docs-sbt-plugin" % sys.props.getOrElse("play.version", "2.9.0-M2"))
-addSbtPlugin("de.heikoseeberger" % "sbt-header"           % "5.8.0")
+addSbtPlugin("de.heikoseeberger" % "sbt-header"           % "5.9.0")
 addSbtPlugin("org.scalameta"     % "sbt-scalafmt"         % "2.4.6")
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 964e03bb..9497b42a 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -5,6 +5,6 @@ addSbtPlugin("org.scala-js"       % "sbt-scalajs"              % "1.11.0")
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.2.0")
 
 addSbtPlugin("com.typesafe"      % "sbt-mima-plugin" % "1.1.1")
-addSbtPlugin("de.heikoseeberger" % "sbt-header"      % "5.8.0")
+addSbtPlugin("de.heikoseeberger" % "sbt-header"      % "5.9.0")
 addSbtPlugin("org.scalameta"     % "sbt-scalafmt"    % "2.4.6")
 addSbtPlugin("ch.epfl.scala"     % "sbt-bloop"       % "1.5.4")