diff --git a/.github/workflows/auto-update.yml b/.github/workflows/auto-update.yml
index 67a7efc22..0d2d8cf93 100644
--- a/.github/workflows/auto-update.yml
+++ b/.github/workflows/auto-update.yml
@@ -14,7 +14,7 @@ jobs:
         submodules: 'recursive'
     - name: Install hub
       run: sudo apt-get install -y hub
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@v31.8.0
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - uses: cachix/cachix-action@v16
diff --git a/.github/workflows/bump-command.yml b/.github/workflows/bump-command.yml
index 8fe15a486..cc2eed7cc 100644
--- a/.github/workflows/bump-command.yml
+++ b/.github/workflows/bump-command.yml
@@ -7,7 +7,7 @@ jobs:
   bump:
     runs-on: ubuntu-latest
     steps:
-      - uses: cachix/install-nix-action@V27
+      - uses: cachix/install-nix-action@v31.8.0
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v16
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6bdefafc0..7f9cac880 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -257,7 +257,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         submodules: 'recursive'
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@v31.8.0
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - uses: cachix/cachix-action@v16
@@ -282,7 +282,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         submodules: 'recursive'
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@v31.8.0
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - uses: cachix/cachix-action@v16
@@ -298,7 +298,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         submodules: 'recursive'
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@v31.8.0
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - uses: cachix/cachix-action@v16
@@ -314,7 +314,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         submodules: 'recursive'
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@v31.8.0
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - uses: cachix/cachix-action@v16
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ff059d5e4..6d381197e 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -13,7 +13,7 @@ jobs:
     name: Create Release
     runs-on: ubuntu-latest
     steps:
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@v31.8.0
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - uses: cachix/cachix-action@v16
diff --git a/.github/workflows/tag-release.yml b/.github/workflows/tag-release.yml
index 53423cf94..2fa57859a 100644
--- a/.github/workflows/tag-release.yml
+++ b/.github/workflows/tag-release.yml
@@ -15,7 +15,7 @@ jobs:
         app_id: ${{ secrets.APP_ID }}
         private_key: ${{ secrets.APP_PRIVATE_KEY }}
 
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@v31.8.0
       with:
         nix_path: nixpkgs=channel:nixos-unstable