diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 997b9a66..07c3c0d4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -40,7 +40,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
       - name: Check feature ${{ matrix.feature }} only
         run: nix develop .#stable -c cargo check --no-default-features --features=${{ matrix.feature }}
       - name: Check feature ${{ matrix.feature }} with defaults
@@ -73,6 +73,6 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
       - name: All features
         run: nix develop ".#${{ matrix.toolchain }}" -c cargo check --workspace --all-targets --all-features
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index cbb6d3ae..8f1dcdce 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
       - name: Build
         run: nix develop .#codecov -c cargo build --release
       - name: Test
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 1e660eab..61103a9c 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
       - name: Formatting
         run: nix develop .#nightly -c cargo fmt --all -- --check
   clippy:
@@ -23,7 +23,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
       - name: Clippy
         run: nix develop .#nightly -c cargo clippy --workspace --all-features --all-targets -- -D warnings
   doc:
@@ -31,6 +31,6 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
       - name: Doc
         run: nix develop .#nightly -c cargo doc --workspace --all-features
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 10e84b4c..ade0d8a4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,6 +15,6 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
       - name: Build & test
         run: nix develop .#stable -c cargo test --workspace --all-features --no-fail-fast