diff --git a/configuration.nix b/configuration.nix
index 3f5bf1ef8..8ceafffa3 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -79,4 +79,6 @@
 
   nix.gc.automatic = true;
   nix.gc.options = "--delete-older-than 15d";
+
+  system.stateVersion = "18.03";
 }