diff --git a/.github/workflows/docgen.yml b/.github/workflows/docgen.yml
index 20ff9ca..df66153 100644
--- a/.github/workflows/docgen.yml
+++ b/.github/workflows/docgen.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v26
+      - uses: cachix/install-nix-action@V27
       - uses: cachix/cachix-action@v14
         with:
           name: mrcjkb
diff --git a/.github/workflows/nix-build.yml b/.github/workflows/nix-build.yml
index 2d14198..2fa88d4 100644
--- a/.github/workflows/nix-build.yml
+++ b/.github/workflows/nix-build.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v26
+    - uses: cachix/install-nix-action@V27
     - uses: cachix/cachix-action@v14
       with:
         name: mrcjkb
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v26
+    - uses: cachix/install-nix-action@V27
     - uses: cachix/cachix-action@v14
       with:
         name: mrcjkb
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 5694a52..4c1c8b2 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -11,7 +11,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
         with:
           extra_nix_config: |
             experimental-features = nix-command flakes