diff --git a/build.sbt b/build.sbt
index c5ff7dc7..a5ed0c30 100644
--- a/build.sbt
+++ b/build.sbt
@@ -209,6 +209,20 @@ lazy val unidocs = project
 // http://localhost:4242
 import laika.ast.VirtualPath
 import laika.config.{LinkConfig, ApiLinks, SourceLinks, TargetDefinition}
+import laika.config.{Version, Versions}
+import laika.theme.ThemeProvider
+import laika.helium.Helium
+
+val docVersions = Versions
+    .forCurrentVersion(Version("0.8.0", "0.8.0").setCanonical)
+    .withNewerVersions(
+        Version("0.9.0-RC1", "0.9.0-RC1").withLabel("release-candidate")
+    )
+
+val docTheme: ThemeProvider = Helium.defaults
+    .site.versions(docVersions)
+    .build
+
 lazy val docs = project
     .in(file("site"))
     .dependsOn(
@@ -226,6 +240,7 @@ lazy val docs = project
         Compile / scalacOptions ~= (_.filterNot { x => x.startsWith("-W") })
     )
     .settings(
+        laikaTheme := docTheme,
         laikaConfig := LaikaConfig.defaults
             .withConfigValue(
                 LinkConfig.empty
diff --git a/docs/directory.conf b/docs/directory.conf
index 06c913a8..452c8d69 100644
--- a/docs/directory.conf
+++ b/docs/directory.conf
@@ -1,3 +1,4 @@
+laika.versioned = true
 laika.navigationOrder = [
   coulomb-core.md
   coulomb-units.md