diff --git a/arend.yaml b/arend.yaml
index d7a5db06..6640f29d 100644
--- a/arend.yaml
+++ b/arend.yaml
@@ -1,5 +1,5 @@
-langVersion: 1.8
-version: 1.8
+langVersion: 1.9
+version: 1.9
 sourcesDir: src
 testsDir: test
 binariesDir: bin