diff --git a/README.md b/README.md
index cbf03ee..d72464b 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ Overriding is more powerful (for non-nested flakes) as it allows to change a fla
 
 Example:
 ```console
-$ nix flake lock --override-input nixpkgs 'github:nixos/nixpkgs?ref=nixos-24.11'
+$ nix flake lock --override-input nixpkgs 'github:nixos/nixpkgs?ref=nixos-25.05'
 $ nix flake lock --override-input selfprivacy-api 'git+https://git.selfprivacy.org/SelfPrivacy/selfprivacy-rest-api.git?ref=flakes'
 ```