diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index a6005cfe4..855b105ea 100644
--- a/.github/workflows/update-flake.yml
+++ b/.github/workflows/update-flake.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@6004951b182f8860210c8d6f0d808ec5b1a33d28 # v25
+      - uses: cachix/install-nix-action@8887e596b4ee1134dae06b98d573bd674693f47c # v26
 
       - uses: DeterminateSystems/update-flake-lock@v21
         with: