diff --git a/.github/workflows/binaries.yaml b/.github/workflows/binaries.yaml
index 15d35dfc9b3..e65a26c605e 100644
--- a/.github/workflows/binaries.yaml
+++ b/.github/workflows/binaries.yaml
@@ -22,7 +22,7 @@ jobs:
         fetch-depth: 0
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -60,7 +60,7 @@ jobs:
         fetch-depth: 0
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/cardano-node.yaml b/.github/workflows/cardano-node.yaml
index e8b7c1319c1..a269352bd71 100644
--- a/.github/workflows/cardano-node.yaml
+++ b/.github/workflows/cardano-node.yaml
@@ -18,7 +18,7 @@ jobs:
         ref: 8.7.2
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -50,7 +50,7 @@ jobs:
         ref: 170817f5ba3f7838ffd9bd181bc30504906a6506
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/ci-nix.yaml b/.github/workflows/ci-nix.yaml
index 252e529906d..836b739f517 100644
--- a/.github/workflows/ci-nix.yaml
+++ b/.github/workflows/ci-nix.yaml
@@ -33,7 +33,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -115,7 +115,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -162,7 +162,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -241,7 +241,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
@@ -266,7 +266,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/docker.yaml b/.github/workflows/docker.yaml
index 106d55c64e4..3ca2603b0e7 100644
--- a/.github/workflows/docker.yaml
+++ b/.github/workflows/docker.yaml
@@ -33,7 +33,7 @@ jobs:
         password: ${{ secrets.GITHUB_TOKEN }}
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/formatting.yaml b/.github/workflows/formatting.yaml
index 9b63edb2c15..9fe8aeec4f3 100644
--- a/.github/workflows/formatting.yaml
+++ b/.github/workflows/formatting.yaml
@@ -12,7 +12,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true
diff --git a/.github/workflows/smoke-test.yaml b/.github/workflows/smoke-test.yaml
index f50c6a3d0c0..dc0ec38bd4e 100644
--- a/.github/workflows/smoke-test.yaml
+++ b/.github/workflows/smoke-test.yaml
@@ -35,7 +35,7 @@ jobs:
         submodules: true
 
     - name: ❄ Prepare nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@V27
       with:
         extra_nix_config: |
           accept-flake-config = true