diff --git a/build.sbt b/build.sbt
index 32ef9ad..72177ec 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion     := "2.13.8"
+ThisBuild / scalaVersion     := "2.13.11"
 ThisBuild / version          := "0.1.0-SNAPSHOT"
 ThisBuild / organization     := "com.gu"
 ThisBuild / organizationName := "The Guardian"
diff --git a/project/build.properties b/project/build.properties
index c8fcab5..40b3b8e 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.6.2
+sbt.version=1.9.0