diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2bdf43c889..bf62843209 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -492,7 +492,7 @@ jobs:
 
       # I could not find a way to install tree-grepper without nix
       # https://github.com/BrianHicks/tree-grepper/issues/293
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@v29
       - uses: cachix/cachix-action@v14
         with:
             name: tree-grepper