diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 22245b33..26e9177d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -119,7 +119,7 @@ jobs:
             sudo rm -rf /usr/local/* /usr/share/* /opt/*
             docker rmi $(docker image ls -aq)
           fi
-      - uses: cachix/install-nix-action@V27
+      - uses: cachix/install-nix-action@v29
       - uses: DeterminateSystems/magic-nix-cache-action@v7
       - uses: cachix/cachix-action@v15
         with: