diff --git a/VERSION b/VERSION
index 0d69699..08e17e1 100644
--- a/VERSION
+++ b/VERSION
@@ -1,3 +1,3 @@
-3.6.2
+4.0.0
 stable
 0
diff --git a/template/flake.nix b/template/flake.nix
index 0bf8460..b489c86 100644
--- a/template/flake.nix
+++ b/template/flake.nix
@@ -3,7 +3,7 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
-    repo-lib.url = "git+https://git.dgren.dev/eric/nix-flake-lib?ref=refs/tags/v3.6.2";
+    repo-lib.url = "git+https://git.dgren.dev/eric/nix-flake-lib?ref=refs/tags/v4.0.0";
     repo-lib.inputs.nixpkgs.follows = "nixpkgs";
   };