diff --git a/languages.nix b/languages.nix
index 2d860df..403af5e 100644
--- a/languages.nix
+++ b/languages.nix
@@ -1,5 +1,5 @@
 { base, callPackage, lib, python3, components }:
-assert lib.assertMsg (base ? versionAtLeast && base.versionAtLeast "8") "Nedryglot requires at least Nedryland version 8.0.0";
+assert lib.assertMsg (base ? versionAtLeast && base.versionAtLeast "9") "Nedryglot requires at least Nedryland version 9.0.0";
 {
   languages = rec{
     rust = callPackage ./rust { inherit base; };