diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d44df0fc..f79f3f30 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -42,7 +42,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - 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 ${{ matrix.feature }} with defaults
@@ -76,6 +76,6 @@ jobs:
       - name: checkout
         uses: actions/checkout@v4
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
       - name: Check rgb-core
         run: nix develop ".#${{ matrix.toolchain }}" -c cargo check --workspace --all-targets --all-features
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index 8ec9a6b5..83635911 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -21,7 +21,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - 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 b9ea9fce..d0c3d11e 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -21,7 +21,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - 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:
@@ -29,7 +29,7 @@ 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 .#stable -c cargo clippy --workspace --all-features --all-targets -- -D warnings
   doc:
@@ -37,7 +37,7 @@ 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 .#stable -c cargo doc --workspace --all-features
   typos:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7e50c4e9..e5bff4d7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - 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
   wasm-testing:
@@ -29,6 +29,6 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
       - name: Test in headless Chrome
         run: nix develop .#wasm -c wasm-pack test --headless --chrome