diff --git a/.scala-steward.conf b/.scala-steward.conf
new file mode 100644
index 0000000..d3c9518
--- /dev/null
+++ b/.scala-steward.conf
@@ -0,0 +1 @@
+updates.ignore = [ { groupId = "org.scala-sbt" } ]
diff --git a/project/build.properties b/project/build.properties
index 06703e3..c0bab04 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.3.9
+sbt.version=1.2.8