diff --git a/.github/workflows/nix-action-coq-8.16-macos.yml b/.github/workflows/nix-action-coq-8.16-macos.yml
index 636b93bb8..8ba44b552 100644
--- a/.github/workflows/nix-action-coq-8.16-macos.yml
+++ b/.github/workflows/nix-action-coq-8.16-macos.yml
@@ -23,7 +23,7 @@ jobs:
       with:
         nix_path: nixpkgs=channel:nixpkgs-unstable
     - name: Cachix setup metacoq
-      uses: cachix/cachix-action@v14
+      uses: cachix/cachix-action@v15
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
         extraPullNames: coq, coq-community
@@ -63,7 +63,7 @@ jobs:
       with:
         nix_path: nixpkgs=channel:nixpkgs-unstable
     - name: Cachix setup metacoq
-      uses: cachix/cachix-action@v14
+      uses: cachix/cachix-action@v15
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
         extraPullNames: coq, coq-community
@@ -108,7 +108,7 @@ jobs:
       with:
         nix_path: nixpkgs=channel:nixpkgs-unstable
     - name: Cachix setup metacoq
-      uses: cachix/cachix-action@v14
+      uses: cachix/cachix-action@v15
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
         extraPullNames: coq, coq-community
diff --git a/.github/workflows/nix-action-coq-8.16-ubuntu.yml b/.github/workflows/nix-action-coq-8.16-ubuntu.yml
index f633398ef..652924058 100644
--- a/.github/workflows/nix-action-coq-8.16-ubuntu.yml
+++ b/.github/workflows/nix-action-coq-8.16-ubuntu.yml
@@ -23,7 +23,7 @@ jobs:
       with:
         nix_path: nixpkgs=channel:nixpkgs-unstable
     - name: Cachix setup metacoq
-      uses: cachix/cachix-action@v14
+      uses: cachix/cachix-action@v15
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
         extraPullNames: coq, coq-community
@@ -63,7 +63,7 @@ jobs:
       with:
         nix_path: nixpkgs=channel:nixpkgs-unstable
     - name: Cachix setup metacoq
-      uses: cachix/cachix-action@v14
+      uses: cachix/cachix-action@v15
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
         extraPullNames: coq, coq-community
@@ -108,7 +108,7 @@ jobs:
       with:
         nix_path: nixpkgs=channel:nixpkgs-unstable
     - name: Cachix setup metacoq
-      uses: cachix/cachix-action@v14
+      uses: cachix/cachix-action@v15
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
         extraPullNames: coq, coq-community