diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 035fb73..d6819e8 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v20
+    - uses: cachix/install-nix-action@v26
     - uses: cachix/cachix-action@v12
       with:
         name: nixpkgs-update
diff --git a/.github/workflows/doc.yaml b/.github/workflows/doc.yaml
index 9e1e209..469c301 100644
--- a/.github/workflows/doc.yaml
+++ b/.github/workflows/doc.yaml
@@ -14,7 +14,7 @@ jobs:
         with:
           # Nix Flakes doesn't work on shallow clones
           fetch-depth: 0
-      - uses: cachix/install-nix-action@v15
+      - uses: cachix/install-nix-action@v26
         with:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/flake-updates.yml b/.github/workflows/flake-updates.yml
index 7f95db6..76b9e7b 100644
--- a/.github/workflows/flake-updates.yml
+++ b/.github/workflows/flake-updates.yml
@@ -9,7 +9,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install Nix
-        uses: cachix/install-nix-action@v25
+        uses: cachix/install-nix-action@v26
         with:
           extra_nix_config: |
             experimental-features = nix-command flakes