diff --git a/.github/workflows/flake-update.yml b/.github/workflows/flake-update.yml
index 0c7e3855..a912327f 100644
--- a/.github/workflows/flake-update.yml
+++ b/.github/workflows/flake-update.yml
@@ -17,7 +17,7 @@ jobs:
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Install nix
-        uses: cachix/install-nix-action@v19
+        uses: cachix/install-nix-action@v20
         with:
           extra_nix_config: |
             auto-optimise-store = true
@@ -46,7 +46,7 @@ jobs:
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Install nix
-        uses: cachix/install-nix-action@v19
+        uses: cachix/install-nix-action@v20
         with:
           extra_nix_config: |
             auto-optimise-store = true
@@ -90,7 +90,7 @@ jobs:
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Install nix
-        uses: cachix/install-nix-action@v19
+        uses: cachix/install-nix-action@v20
         with:
           extra_nix_config: |
             auto-optimise-store = true
@@ -126,7 +126,7 @@ jobs:
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Install nix
-        uses: cachix/install-nix-action@v19
+        uses: cachix/install-nix-action@v20
         with:
           extra_nix_config: |
             auto-optimise-store = true
@@ -158,7 +158,7 @@ jobs:
         with:
           token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Install nix
-        uses: cachix/install-nix-action@v19
+        uses: cachix/install-nix-action@v20
         with:
           extra_nix_config: |
             auto-optimise-store = true