diff --git a/flake.nix b/flake.nix
index 3cfc46b..c72bc7c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -29,7 +29,7 @@
           ];
 
           nativeBuildInputs = [
-            (lib.hiPrio rust-bin.nightly."2025-04-30".rustfmt)
+            (lib.hiPrio rust-bin.nightly."2025-07-05".rustfmt)
             rust-bin.stable.latest.default
           ];