diff --git a/.github/workflows/build-nix.yml b/.github/workflows/build-nix.yml
index 295a19326b..c3dc89ec22 100644
--- a/.github/workflows/build-nix.yml
+++ b/.github/workflows/build-nix.yml
@@ -35,7 +35,7 @@ jobs:
           sudo apt install -q -y qemu-system-aarch64 qemu-efi binfmt-support qemu-user-static
           mkdir -p ~/.config/nix
           echo "system-features = aarch64-linux arm-linux" | sudo tee -a /etc/nix/nix.conf
-      - uses: cachix/cachix-action@v14
+      - uses: cachix/cachix-action@v15
         with:
           name: unblob
           authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
diff --git a/.github/workflows/update-nix.yml b/.github/workflows/update-nix.yml
index 9a128936de..7769e09719 100644
--- a/.github/workflows/update-nix.yml
+++ b/.github/workflows/update-nix.yml
@@ -13,7 +13,7 @@ jobs:
         with:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-      - uses: cachix/cachix-action@v14
+      - uses: cachix/cachix-action@v15
         with:
           name: unblob
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
@@ -35,7 +35,7 @@ jobs:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-      - uses: cachix/cachix-action@v14
+      - uses: cachix/cachix-action@v15
         with:
           name: unblob
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"