diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3df58ea..2a851c7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -34,7 +34,7 @@ jobs:
       uses: actions/checkout@v4
     - name: Install Nix
       if: ${{ matrix.cachixName == 'pkgs' }}
-      uses: DeterminateSystems/nix-installer-action@v16
+      uses: DeterminateSystems/nix-installer-action@v20
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
         extra-conf: |
@@ -42,7 +42,7 @@ jobs:
           extra-trusted-public-keys = pkgs.cachix.org-1:/fnDPhnDwMjJA8IXJl+eAJmnU3n/jgfgvb6SZGuq4gs=
     - name: Install Nix (with unfree substituters)
       if: ${{ matrix.cachixName == 'some-unfree' }}
-      uses: DeterminateSystems/nix-installer-action@v16
+      uses: DeterminateSystems/nix-installer-action@v20
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
         extra-conf: |
diff --git a/.github/workflows/nix-flake-update.yml b/.github/workflows/nix-flake-update.yml
index 45fc27e..1db021e 100644
--- a/.github/workflows/nix-flake-update.yml
+++ b/.github/workflows/nix-flake-update.yml
@@ -11,7 +11,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v16
+        uses: DeterminateSystems/nix-installer-action@v20
         with:
           github-token: ${{ secrets.GH_PAT }}
       - name: Update flake.lock
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 3803c8f..e7cfa63 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -13,7 +13,7 @@ jobs:
       with:
         token: ${{ secrets.GH_PAT }}
     - name: Install Nix
-      uses: DeterminateSystems/nix-installer-action@v16
+      uses: DeterminateSystems/nix-installer-action@v20
       with:
         github-token: ${{ secrets.GH_PAT }}
     - uses: DeterminateSystems/magic-nix-cache-action@v9