diff --git a/.github/workflows/flake-update.yml b/.github/workflows/flake-update.yml
index 8a976fae..643e0132 100644
--- a/.github/workflows/flake-update.yml
+++ b/.github/workflows/flake-update.yml
@@ -17,7 +17,7 @@ jobs:
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Install nix
-        uses: cachix/install-nix-action@V27
+        uses: cachix/install-nix-action@V28
         with:
           extra_nix_config: |
             auto-optimise-store = true
@@ -46,7 +46,7 @@ jobs:
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Install nix
-        uses: cachix/install-nix-action@V27
+        uses: cachix/install-nix-action@V28
         with:
           extra_nix_config: |
             auto-optimise-store = true
@@ -91,7 +91,7 @@ jobs:
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Install nix
-        uses: cachix/install-nix-action@V27
+        uses: cachix/install-nix-action@V28
         with:
           extra_nix_config: |
             auto-optimise-store = true
@@ -127,7 +127,7 @@ jobs:
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Install nix
-        uses: cachix/install-nix-action@V27
+        uses: cachix/install-nix-action@V28
         with:
           extra_nix_config: |
             auto-optimise-store = true
@@ -159,7 +159,7 @@ jobs:
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Install nix
-        uses: cachix/install-nix-action@V27
+        uses: cachix/install-nix-action@V28
         with:
           extra_nix_config: |
             auto-optimise-store = true