diff --git a/.github/workflows/build_static.yml b/.github/workflows/build_static.yml
index 2d07d4f58..e650fd799 100644
--- a/.github/workflows/build_static.yml
+++ b/.github/workflows/build_static.yml
@@ -43,7 +43,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Nix
-        uses: cachix/install-nix-action@V27
+        uses: cachix/install-nix-action@v29
 
       - name: Enable Cachix
         uses: cachix/cachix-action@v15
diff --git a/.github/workflows/contracts.yml b/.github/workflows/contracts.yml
index 0d5fad542..793a4e61f 100644
--- a/.github/workflows/contracts.yml
+++ b/.github/workflows/contracts.yml
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Install Nix
-        uses: cachix/install-nix-action@V27
+        uses: cachix/install-nix-action@v29
 
       - name: Enable Cachix
         uses: cachix/cachix-action@v15
diff --git a/.github/workflows/test-demo-native.yml b/.github/workflows/test-demo-native.yml
index 51d1137ad..9bd119da6 100644
--- a/.github/workflows/test-demo-native.yml
+++ b/.github/workflows/test-demo-native.yml
@@ -29,7 +29,7 @@ jobs:
         uses: foundry-rs/foundry-toolchain@v1
 
       - name: Install Nix
-        uses: cachix/install-nix-action@V27
+        uses: cachix/install-nix-action@v29
 
       - name: Install process-compose
         run: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 58317411e..a7ab8e11f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -36,7 +36,7 @@ jobs:
           version: nightly
 
       - name: Install Nix
-        uses: cachix/install-nix-action@V27
+        uses: cachix/install-nix-action@v29
 
       - uses: taiki-e/install-action@nextest
 
diff --git a/.github/workflows/update_nix.yml b/.github/workflows/update_nix.yml
index f7dfd33f6..4ed075c7c 100644
--- a/.github/workflows/update_nix.yml
+++ b/.github/workflows/update_nix.yml
@@ -17,7 +17,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Nix
-        uses: cachix/install-nix-action@V27
+        uses: cachix/install-nix-action@v29
 
       - uses: cachix/cachix-action@v15
         with: