diff --git a/examples/configuration.nix b/examples/configuration.nix
index bc1c990..1368813 100644
--- a/examples/configuration.nix
+++ b/examples/configuration.nix
@@ -274,7 +274,7 @@
   # compatible, in order to avoid breaking some software such as database
   # servers. You should change this only after NixOS release notes say you
   # should.
-  system.stateVersion = "21.05"; # Did you read the comment?
+  system.stateVersion = "21.11"; # Did you read the comment?
 
   # The nix-bitcoin release version that your config is compatible with.
   # When upgrading to a backwards-incompatible release, nix-bitcoin will display an